Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f2c77bbdff6de2…

MALICIOUS

PDF

61.1 KB Created: 2020-07-24 17:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a7d122a0ca12bd5a21ae0faeaf7bb0b SHA-1: 6280487f2f0bc2f3cc934bce8f296ac12cd24b69 SHA-256: c5f2c77bbdff6de222720fe81d530f98a66cd59a28b488444e86fa13ecb5a039
202 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to domains associated with link farms and redirectors. One such URL, 'https://ttraff.com/pify?keyword=guided+math+small+group+lesson+plan', is flagged as a malicious redirector. The presence of a 'download button' heuristic further suggests a lure to entice users to click these links. The document body is heavily obfuscated and contains no readable text to provide further context.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=guided+math+small+group+lesson+plan In PDF document text
    • http://files.goldnchromefishing.com/uploads/1/3/0/9/130969981/2006089.pdfIn PDF document text
    • http://files.kullaf.com/uploads/1/3/1/4/131453861/penuvexegikaxovegid.pdfIn PDF document text
    • http://files.jacksonbands.com/uploads/1/3/1/6/131636930/dd665372f.pdfIn PDF document text
    • http://files.hopeheritagedays.org/uploads/1/3/1/1/131163777/vogakoxot_goveri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/15936325417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/14198875221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/xatasufuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/65289882978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/88694039161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/xojoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/80886515767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/81316578118.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_off00008954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8954 5288 bytes
SHA-256: 4d1dd44e5d5b094e43546cc4806f8b55450749b8bb28a58fc58bbc0475ce3751
font_01_sfnt_off00009b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1E 4180 bytes
SHA-256: 47729626dab05303d455320e2c56787280697c2a5c03d24353169ff9c0d0def1
font_02_sfnt_off0000ab47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB47 10560 bytes
SHA-256: 528f9dfd089bbd1ed07b4e6d37b84f87a61e9c15f9c64a73798019362d431dd9
font_03_sfnt_off0000cf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 16452 bytes
SHA-256: 6b88312ab20f16ed5ba8367fd5ab0c939dfa35f392f4b011c98774957b1de67e