Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a33d1a4aef1d92…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 10:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 823a2dcecce0e85858eb68ec75f4a6ed SHA-1: 20eb710fc580b7e4cead35454a0328b1cd4cb032 SHA-256: 80a33d1a4aef1d92a99cf0d3550fdcb7c90aeba21eb68738765bb11f589fdff9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to known malicious infrastructure, disguised as a free antivirus download. The document body explicitly contains the malicious URL and several other URLs hosted on Shopify and other domains, likely part of a link farm to improve SEO for the malicious redirector. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=antivirus+avira+gratis+2018 In PDF document text
    • http://files.coderedpicturecompany.com/uploads/1/3/1/3/131379743/6229699.pdfIn PDF document text
    • http://files.omganeshayoga.com/uploads/1/3/0/9/130969446/44f17b5ad8.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/1/0428/9835/8432/files/buxidumex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/tcs_verbal_ability_questions_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/lapakasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/pozunebugamuxolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/gk_current_affairs_2020_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/90124839614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/3290/4615/files/trusteer_rapport_safe_uninstall_utility.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/5294226618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/62824111311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/building_skills_toefl_ibt_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/69152660160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6112/0919/files/chemistry_balancing_chemical_equations_worksheet.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 3

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_off00006c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C56 5388 bytes
SHA-256: cc4aea91f15f7507070f91349e7e10ea034a49ae93f79139860cd68bfd4a03ec
font_01_sfnt_off00007eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBA 13444 bytes
SHA-256: 1887d1a0c4840641cea54036897c2aa1a137a3af8c3c59faa51d654d276e1a6e

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