Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5c6d13ae1adf3a…

MALICIOUS

PDF

36.1 KB Created: 2020-08-15 10:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c506879c4dffa1699d50cf9f6f1314d6 SHA-1: 8aac92f421115fe1b85ff6d07fcc455ab0e691e6 SHA-256: 2c5c6d13ae1adf3a414ace70bc3bdd8e2128fcb85fa6c2ceaca3d8284f6ffe4d
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for 'ap chemistry textbook online pdf'. This suggests a phishing or social engineering lure. The document also contains a large number of links to PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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/wb?keyword=ap%20chemistry%20textbook%20online%20pdf In PDF document text
    • http://files.birdsontheniagara.org/uploads/1/3/0/7/130775583/debepadem-lomojakezexoki-vifuvogelumo.pdfIn PDF document text
    • http://files.tropicsailing.com/uploads/1/3/1/3/131398360/bagapitebir-dodarawavejapu-pomexajoxow-jefanapurorukum.pdfIn PDF document text
    • http://files.stevecrowhurst.com/uploads/1/3/1/4/131437775/karodabunudusof_nolobikepegasu.pdfIn PDF document text
    • http://files.corsicanamainstreet.org/uploads/1/3/1/6/131607712/32807d48890f3ca.pdfIn PDF document text
    • http://files.sleddogsocietyofwales.co.uk/uploads/1/3/0/7/130739802/ca35f4c.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/1/0432/2459/6642/files/11341230774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3434/files/epic_emr_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/jisokabuwidejotaturumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/7414121239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/sediwanatepezesipifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7640/2854/files/zuxiramomefugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/kanevobukoratemuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/tififesavuvorowa.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 6

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_off00004f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F14 5548 bytes
SHA-256: 159ca6218750b7b5ab4f082cfae82d4c02cb37808f96d21aabf1acafb7795990
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 10004 bytes
SHA-256: aa94e30bfcdb683e28535dc5059394b3bc04280b15bbc5bc49cc239acb4443b1

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