Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb656ccf255747b4…

MALICIOUS

PDF

98.0 KB Created: 2020-08-08 09:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5868b9c3a7f739029039d1942dcca088 SHA-1: 25f92c6ebb03053dcaef88dfd7f2e789c68ec281 SHA-256: bb656ccf255747b4a4ac4c9c490ddf9e3708f43d7d5abecc7fc24f9f040de0c9
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=classroom+objects+coloring+pages+pdf', indicating a lure to a malicious URL. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests this PDF may be part of a multi-stage attack where the actual payload is password-protected.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=classroom+objects+coloring+pages+pdf In PDF document text
    • http://volajap.terraformidable.com/uploads/1/3/1/8/131856725/dezom.pdfIn PDF document text
    • http://files.brucemakotoarnold.com/uploads/1/3/0/7/130740258/1659094.pdfIn PDF document text
    • http://files.usaerospacedefensegroup.com/uploads/1/3/2/7/132740779/jefejuzo.pdfIn PDF document text
    • http://moxilube.biesyiczadyfci.com/uploads/1/3/2/7/132710621/2420425.pdfIn PDF document text
    • http://files.philadelphiapediatrics.org/uploads/1/3/0/9/130969079/0e8edac97f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/vudaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/tawiwirejekezapakuxara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/zubixigafewomojimezuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9611/2294/files/vupasoxatimuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/65498763708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/dalopawedujoremurova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/chicago_quick_traffic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/duvevugamidalopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/zemavazuzibik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/9057588673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9954/3970/files/31228341157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/negative_character_traits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/wurebodemedizeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/waxakakujakerotuketoxobu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001407b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1407B 25272 bytes
SHA-256: f8dc7fe72351b9bc907b43dd6a31d295ee7c72014164f490193ba7dc49a6506b
font_00_sfnt_off0000fb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 5504 bytes
SHA-256: b8d9bbe608f42c334a7997c40fcbcfd08d6350f4c5274b8221447d0084fc980a
font_01_sfnt_off00010e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 16200 bytes
SHA-256: d32462d73e9e21db25335f07400828f7b32da4962696c79d333bfae732dc4ad1
font_03_sfnt_off00016bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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