Malicious PDF — malware analysis report

Static analysis result for SHA-256 833c319db4c74036…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 09:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b3b2b816dd7c1b19554914fc3622733 SHA-1: 7cdd7236c269193eb81b5e2d32dc46e4a9a7c41e SHA-256: 833c319db4c740364b9e42b695a4c3efed9bccfa8e88bc775d7f324910a451bc
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a redirector URL, which is flagged as malicious. The document body text, though partially corrupted, suggests a lure related to software installation ('Centos install pip3'). The presence of numerous PDF links, many pointing to Shopify domains, indicates an attempt to create a link farm or distribute further malicious content. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=centos+install+pip3 In PDF document text
    • http://files.davidschwartzmft.com/uploads/1/3/1/8/131871835/litarelatezabe-vojevaro-pujuja.pdfIn PDF document text
    • http://files.garagedoorsandmotorsipswich.com/uploads/1/3/1/4/131407968/ditev_zatujulugepafak_tetude.pdfIn PDF document text
    • http://files.clairesadler.co.nz/uploads/1/3/0/7/130739727/komezapelot.pdfIn PDF document text
    • http://files.bellydancewalnutcreek.com/uploads/1/3/2/3/132303001/2f4246908f2.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/1/0430/1720/7971/files/tomajobososivusinipex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/31376535404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/56691465155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/lobufojiteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/26351338868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/medesufaruverukamobawebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7749/1098/files/tobejowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/92430368540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/wobara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/vafomolofepiraxug.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_off00006033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 4788 bytes
SHA-256: 5783aa64b37ea107709cb086c8937f4e6a87e6650b77239424b7c4e0c09ef4aa
font_01_sfnt_off0000708b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 13192 bytes
SHA-256: c3acae9aa94a548f0e57ce5764d6cfc5b84a62292ff8c44d03995ad5e47f2997

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