Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ce855aaad8c39b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-12 18:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e3c812e9461d8f92c292370d2e9c984 SHA-1: 1078b4eb7ec4f8d56a88409592327f56900c1ce3 SHA-256: e6ce855aaad8c39b627df7d0a2479cf86f73ae7f410b5a74a9245681b339035d
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector link disguised as a free download for a medical examination PDF. The document body contains the malicious URL, confirming the lure. The presence of numerous links to Shopify domains suggests an attempt to blend malicious links with seemingly benign content, likely for SEO poisoning to attract victims.

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=demyer%20neurologic%20examination%20pdf%20free%20download In PDF document text
    • http://files.allstudentsallstandards.org/uploads/1/3/1/4/131437599/robirusutifugitudid.pdfIn PDF document text
    • http://files.mkquilts.com/uploads/1/3/1/4/131483019/e29292478e70.pdfIn PDF document text
    • http://josijiwuf.raniyoung.com/uploads/1/3/0/7/130738721/bavala.pdfIn PDF document text
    • http://bookgeek.top/?download=0071701176In 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/1/0431/7957/3408/files/pdf_to_word_converter_online_without_email_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/zetisedigila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/30844154497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/43080827421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/atm_machine_money_avaiable_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/wixufatarusadulaxegegeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/nojosasijuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/60398726797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/lozebufebewo.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_off00004dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEC 5560 bytes
SHA-256: 48ff90bec12d16dc4ed685a8e20b76e124de130b6422ae68de6b6808ea6da268
font_01_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 9948 bytes
SHA-256: 506b0980dfbe274851a2ab78ee290f5a993a8b4d31bb1651fdd7891c592eed40

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