Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd6fe76c26c3fc0…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 03:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9053c58b5b5b59ea1f3948f2578b62f1 SHA-1: d7e6c555ebd73e8598241d77fe82eabea097a8e1 SHA-256: 5fd6fe76c26c3fc036b67f89fb79d67e89858f8e0a5191f02f6fdc377f22736a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation, likely to obscure the malicious redirector.

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=tennis+bleacher+report+djokovic In PDF document text
    • http://vixev.saidbysydney.com/uploads/1/3/0/8/130814674/volufilev-pepimafovuxa.pdfIn PDF document text
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdfIn PDF document text
    • http://files.charlotteaustwickgolf.co.uk/uploads/1/3/0/8/130813528/bepamim.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/1/0444/2347/9462/files/3th_grade_math_word_problems_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/nugujesisixulobulebivori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/81639675877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/10110197336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/53143531970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/37198097568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4375/0039/files/waste_to_energy_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/xegupuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/peniwarun.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_off000073d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 5452 bytes
SHA-256: 3c25ce9b12944c442a6411db226db6dc5cfccc3341ac7d86f4e92257545e94a8
font_01_sfnt_off00008649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8649 10180 bytes
SHA-256: 39723a0ac0bb68a27ecd5cf0a05fd7ac7e7168e75f7b04c805fdd4f78aec50d9

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