Malicious PDF — malware analysis report

Static analysis result for SHA-256 9753c3217a3492f1…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 17:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c90abe488927eb209c0a601e8bc9b780 SHA-1: 0640bdef8ccf5f517b25edf3855eabe2be11f146 SHA-256: 9753c3217a3492f14b6c312035aa50a82b0311674fa92e23ea634150e5cc49c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a calendar template and the malicious URL, suggesting a lure. The presence of numerous external links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=november+2018+calendar+template+word+doc In PDF document text
    • http://files.impactaquariums.com/uploads/1/3/0/7/130738568/zitemak.pdfIn PDF document text
    • http://files.thehandycornershop.co.uk/uploads/1/3/1/3/131381363/7620326.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/1/0434/4751/7341/files/60156562426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/permissions_for_ssh_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/zejej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/tesis_de_brosimum_alicastrum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/28_days_later_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/biology_book_11th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/16193762486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/aula_plataforma_virtual_uladech.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/dikigotuderojegudezosiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8456/2841/files/ccna_1_for_beginners_notes.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_off00007103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7103 5824 bytes
SHA-256: a653bd676e547f6a53ebb88ee494198db3188b958ccb2660ed9c4010280a028f
font_01_sfnt_off000084cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 10396 bytes
SHA-256: d5f97fe8bb2fa2d9c9d695162101683e6a1287c3d7ab387c54969b2e8f1bd58b

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