Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f35e485d6ce462f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-10 04:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 467b3c2dfc479734ee585e7cf1cb7d3c SHA-1: b85835cbf1ed4091518aaaff8e747ed26cc929dc SHA-256: 0f35e485d6ce462f7817de953bc44c5facc5ca8573abffbd52126fa6ced808be
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.cc/pify?keyword=article+exercise+worksheet+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other links to PDF files, suggesting a link farm or SEO manipulation tactic to lure users to malicious content. The ML classifier also strongly indicated 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.cc/pify?keyword=article+exercise+worksheet+pdf In PDF document text
    • http://files.theglasscarousel.com/uploads/1/3/2/3/132303270/9013606.pdfIn PDF document text
    • http://files.jennypegg.com/uploads/1/3/1/8/131857114/lobemolazuna.pdfIn PDF document text
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.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/1/0451/7065/5381/files/skf_bearing_number_identification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/fupamomolaresijeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/sevojilupinotazolotufuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/tivipinenabosagawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0459/0242/files/26920558266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupuxisupevijerabufogete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/nilegodokipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifenawapuvesuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/nosobenugenavapob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/tokazeveguxobimodov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.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 8

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_off00006e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 5244 bytes
SHA-256: f27a6887e2cca031af8e843a5337ed15a723e75ac9e481a13f2139f84448cc24
font_01_sfnt_off00008045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8045 12944 bytes
SHA-256: c6a56fd00f66bec10778c38a826f7d268a778067c60ce8d9f14e608a3e899532

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