Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cdb390820158e8…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 14:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86678e99da8f695e1031122e34befc6b SHA-1: 977b0481b21e10d0836a66fa1616751c7a482a76 SHA-256: b4cdb390820158e83e94d8087933da4283a1aefba57e8e45d7694a579826c1cf
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, with the primary one being 'https://cdn.shopify.com/s/files/1/0431/7629/6605/files/redajinujojenujijojasekog.pdf'. The document body, though heavily obfuscated, also contains the malicious redirector URL and several other PDF links, suggesting a lure to external content that likely leads to further malicious activity.

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=a+moneta+tandil+hor%25C3%25A1rios+mundiais In PDF document text
    • http://poziwufo.stribbledistrict.com/uploads/1/3/0/8/130813835/tokawedogizo_rupul_ragosor.pdfIn PDF document text
    • http://dowov.amandagretschot.com/uploads/1/3/0/7/130739845/5896801.pdfIn PDF document text
    • http://files.militarypsych.org/uploads/1/3/1/3/131384025/pudaguzapu.pdfIn PDF document text
    • http://fetixilus.embodylifeyoga.com/uploads/1/3/0/9/130969690/b898176f5b8.pdfIn PDF document text
    • http://files.gnowangerupcrc.net/uploads/1/3/1/4/131437236/xovisinusudotudoja.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/1/0431/7629/6605/files/redajinujojenujijojasekog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0706/4734/files/astro_a40_mixamp_pro_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/vegipajaxomewafube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/abstract_internship_report_sample_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/binary_to_hexadecimal_conversion_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/50_50_partnership_agreement_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/autobiography_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0926/0190/files/sidulivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/adverbs_in_english_exercises.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_off00006934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5288 bytes
SHA-256: 7e2293dced3e54f7c152ce317936c1c7def614fcf3c4582c69ed01709d97fb53
font_01_sfnt_off00007a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 12476 bytes
SHA-256: 797d7028d2e73e2d06434f58bab9487d991af47c2f920d874d343a8be7cd7f66

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