Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1c25c7ad67bba5…

MALICIOUS

PDF

50.6 KB Created: 2020-08-11 07:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 543d03e8f98a3c36d3c06c3523adb0a0 SHA-1: b1091fa393b36642aaef141ec44bc5c8521ee911 SHA-256: 8b1c25c7ad67bba53557926d72bccaccc9f981ca0d1d67080f4195fe11925211
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'Catalogo natura ciclo 9 2020 pdf'. This suggests the document is designed to trick users into clicking the malicious link, likely for phishing or to download further malware. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/pify?keyword=catalogo+natura+ciclo+9+2020+pdf In PDF document text
    • http://files.phnompenhtattoo.com/uploads/1/3/1/3/131379663/6058817.pdfIn PDF document text
    • http://files.bvmusicboosters.org/uploads/1/3/1/4/131483445/sumogor.pdfIn PDF document text
    • http://files.veeradonuts.com/uploads/1/3/2/6/132683259/viropawogaluraw-pepewis.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/1/0435/1413/4692/files/vesawalejilotanamafat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2935/4906/files/definition_of_numerical_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/nomekixowitize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2310/5175/files/45484365141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/nekifujimuviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/star_vs_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/48828737127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/calendering_process_for_rubber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/sazaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/38633960042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/history_of_banking_system_in_nigeria.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5360 bytes
SHA-256: 1520a77e92c3acc0f7029d94523c71fd7bf48db0b3ad2a428aa2ddeba449d46b
font_01_sfnt_off00007440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 11344 bytes
SHA-256: 17eaa88295917c3c3fa4a014064b0767fe85069949a542e5fea1ab6506f2abe7
font_02_sfnt_off0000999a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999A 16296 bytes
SHA-256: 21d2c517cc0d2781f643886744ab2248bbe8d92ed1ab736cc2ad748918d5c6f2
font_03_sfnt_off0000af18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF18 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2