Malicious PDF — malware analysis report

Static analysis result for SHA-256 529ffe8c1b74250f…

MALICIOUS

PDF

39.9 KB Created: 2020-08-12 17:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28271ede0daa51cbf0e8dada0f3dac37 SHA-1: 4a3258a865b63368b07931a56b00ca56a91254cb SHA-256: 529ffe8c1b74250f4b7043980e52c91d10d2a34e946c256eb468c7220b8b449f
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to obscure the malicious destination or to leverage SEO tactics for distribution. The primary malicious IOC is the 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/wb?keyword=born%20only%20once%20pdf In PDF document text
    • http://files.mcwilliamsbooks.com/uploads/1/3/0/7/130775490/4141020.pdfIn PDF document text
    • http://dapavagu.st-christophers-nh.org/uploads/1/3/1/6/131637814/718504.pdfIn PDF document text
    • http://files.vontrappflowers.shop/uploads/1/3/0/9/130969434/799077.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/1/0437/0422/1849/files/acto_administrativo_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/kiloganomividoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/95310073383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/curtain_wall_systems_a_primer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/exercise_simple_present_tense.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/english_phonetic_alphabet_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/learning_curve_in_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3359/0940/files/10th_science_book_back_questions_tamil_medium_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/minecraft_commandbook_commands_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/jawaputumive.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 4

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_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 4912 bytes
SHA-256: e727a1472442a54860970aecf1f8a5923bd9fe06a26c35b226c1a172695c2664
font_01_sfnt_off00007159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 9968 bytes
SHA-256: d7377cbc05a84a76bc051dd948645b428b69a7f6342bc76cc13b12c97248f54c

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