Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d80878e775cefd…

MALICIOUS

PDF

37.6 KB Created: 2020-08-21 01:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4966006298f059e0ed47535dbc5bad14 SHA-1: 33d3aab45188eb04e91144fc037d4e77646010fb SHA-256: e2d80878e775cefd18255f0369cc0744964aabe217399a8c8fd333dcd1357f62
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for educational content. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious links.

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=degree+of+monomials+worksheet In PDF document text
    • http://files.stpaullutheranph.com/uploads/1/3/1/3/131379042/vaxezowewaranukomiv.pdfIn PDF document text
    • http://files.cnsbeauty.com/uploads/1/3/1/3/131379680/9125998.pdfIn PDF document text
    • http://jadobesir.houseofblackart.com/uploads/1/3/1/4/131482975/f71996.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/1/0447/3149/8645/files/moxodapizarijexumuzene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5636/0600/files/edgar_allan_poe_the_black_cat_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/amoeba_sisters_video_recap_of_cell_transport_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/circle_theorems_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8097/3477/files/free_art_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/xewexugufuzemorawotudapaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/51280699804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/sosowefizumebuzovakulubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/37486711360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/cerita_rakyat_jawa_timur.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5598 5336 bytes
SHA-256: e0949220932e4a726a0015c93f2b4082a08701e50c0513dc7692453c361075ed
font_01_sfnt_off000067ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 10256 bytes
SHA-256: 11745bb8636c49cc86f456f1fc3b9d054e380f353b6d2cc14693936645d25aea

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