Malicious PDF — malware analysis report

Static analysis result for SHA-256 8067191c374f42ac…

MALICIOUS

PDF

43.8 KB Created: 2020-09-11 19:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f34e40a2ad44bc21e1aeb43a8326219 SHA-1: 9bbb80a9d3b0f412b476d0e1c0d79579cc834a59 SHA-256: 8067191c374f42ac1d2d7604922fac01e37073aeb4aa566ba67b581898aa772c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to 'Microbiology lab exam 2 answers' and embeds multiple links to external PDF files, many of which point to redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that these links are part of a scheme to distribute malicious content or phish users. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=microbiology+lab+exam+2+answers In PDF document text
    • http://files.neurodivercitysg.com/uploads/1/3/0/7/130776182/dodovulebuwu.pdfIn PDF document text
    • http://geparaw.carinagossele.com/uploads/1/3/2/3/132302870/7303114.pdfIn PDF document text
    • http://files.grapevinerealty.com/uploads/1/3/1/8/131860060/goroxebawivonaj.pdfIn PDF document text
    • http://files.nicholsonspeedway.com/uploads/1/3/1/4/131413550/kinawejare.pdfIn PDF document text
    • http://sorure.artistsunitedclub.com/uploads/1/3/1/4/131406893/1032780.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/1/0435/3510/6203/files/portugues_sem_fronteiras_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/honda_gc160_service_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/78189067069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/digivajolodozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/leblanc_advanced_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/xavol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/vazisenuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/20210892545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/pivixazesararap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/6248/0296/files/modal_verb_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/renters_lease_agreement.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 4

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_off00006cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF8 5660 bytes
SHA-256: adc318af39f34566ffc329a64ec012a8aa41904fc1cdbb258a56642f7fb492dc
font_01_sfnt_off00008056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8056 9828 bytes
SHA-256: bddbb61ed7e2b4a171809d0f2f76a25b266a910db187973628a131ecb1e5e0ec

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