Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b738e0fed0c52ba…

MALICIOUS

PDF

48.3 KB Created: 2020-08-11 19:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dfc2ad66fe115d00bef71fc90f92b794 SHA-1: d1f87ac572d34728323e596e110d5df42ddd1c71 SHA-256: 4b738e0fed0c52ba025d54a40d140b1305fceed6f2bec38fc6c317603f3f2cca
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic indicates a direct link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=business+communication+and+management+information+system+pdf'. This redirector likely leads to a malicious payload or phishing page. The document body itself is heavily obfuscated but contains the same redirector URL.

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=business+communication+and+management+information+system+pdf In PDF document text
    • http://pinigixun.chelmsfordosteopaths.com/uploads/1/3/1/3/131398140/217584.pdfIn PDF document text
    • http://xibebid.bellaswyoming.com/uploads/1/3/1/3/131398455/rewadelub.pdfIn PDF document text
    • http://files.bncohen.com/uploads/1/3/1/4/131453251/3524934.pdfIn PDF document text
    • http://files.ajeplanners.com/uploads/1/3/1/4/131406816/sifojopese_nidukuzinagimo_xutokajofuzi_roxurugar.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/1/0438/8562/5499/files/genetic_programming_an_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/72900398905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/pdf_strategic_marketing_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/18460122588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/lifabit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/71113175843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/cancellation_letter_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/60391235339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/bonubixisoguxezex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/57943272499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/valus.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_off000075c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C4 5596 bytes
SHA-256: ab7cf7be1493bc5fd626a3b8580707854de8c9cf831b251bc574cf1648dd896c
font_01_sfnt_off000088b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 13744 bytes
SHA-256: 740a332cd167eb3a40fdedead61f17faf703c9fc01c8ee0b56c8dbc632485d50

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