Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a7e9ec95881bc0…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 22:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c0c8ef87f571723f10ce806f51dc93d SHA-1: 5df801309d0c20fda7657890ff7f132f4a68cd95 SHA-256: 83a7e9ec95881bc0bae3481ef3573abe549826989cda7df8dcfc8a4644e75e68
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to redirector infrastructure designed to obscure the final malicious destination. The primary redirector URL is https://ttraff.ru/pify?keyword=analyzing+evidence+continental+drift+worksheet+answer+key, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other links to PDF files, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=analyzing+evidence+continental+drift+worksheet+answer+key In PDF document text
    • http://powuxit.hhhschoirs.com/uploads/1/3/2/3/132303195/8245673.pdfIn PDF document text
    • http://wepimopin.twobayhorses.com/uploads/1/3/1/3/131383657/86c1dd15641b9f1.pdfIn PDF document text
    • http://tobowo.estherbelin.com/uploads/1/3/1/0/131070450/6741385.pdfIn PDF document text
    • http://zugaso.thehuskyhowler.com/uploads/1/3/1/4/131437044/87e651d881.pdfIn PDF document text
    • http://files.earthartbalance.com/uploads/1/3/1/4/131453329/nikabiz.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/1/0431/9890/6528/files/dogumipalati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/linux_administration_handbook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/thompson_performance_powerblast_plate_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/wasanepupewewefelom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/ponejivabowimizeterona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/50036186800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/85189182994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/curriculum_vitae_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/95056543287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/website_design_and_development_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6667/7655/files/87726262785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9464/4638/files/bulls_on_parade_drum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/pdf_text_editor_freeware.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5995 5640 bytes
SHA-256: bb11a8368a2d5f1199282eed09284b0e6ccc6931f69e3558169cc05fced348ca
font_01_sfnt_off00006cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEA 10580 bytes
SHA-256: 5ac22aa3bd69452b14c9974763254e94c48235875205226597e2703c4553b6b7