Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8794802c267973…

MALICIOUS

PDF

34.7 KB Created: 2020-08-22 17:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 645270ddf69b5aefc3b83531b30cb8fc SHA-1: 2e6432113456b23b5c2c986408167e28c606d8bb SHA-256: 0c8794802c267973876efe66c1dcd776e325f56eb43cfb846c0d443b8ec05c82
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same redirector URL and other PDF files, suggesting a link farm or phishing lure. The ML classifier also strongly indicated 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.com/pify?keyword=countdown+conundrums+with+answers In PDF document text
    • http://files.profedenham.com/uploads/1/3/1/3/131384771/vaxobadafiwodo.pdfIn PDF document text
    • http://jozupam.crrcinc.org/uploads/1/3/1/4/131454215/tuzem-vaseviv-zawezok-bokikugetoz.pdfIn PDF document text
    • http://files.janbenhamcosmetics.com/uploads/1/3/2/8/132815359/dusabixeguselej-wilojazogu-tiguwojariju.pdfIn PDF document text
    • http://files.willycosmosguidetohotsprings.com/uploads/1/3/2/6/132682723/9d2a0.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/1/0428/1230/9671/files/jogok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7744/1438/files/zofulukudekibixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8333/1752/files/businessman_movie_telugu_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/beverley_craven_promise_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ladorusufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6719/5040/files/11180758505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6644/8279/files/gisufer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/21153690671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4340/4441/files/12280948962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/photosynthesis_lab_gizmo_answer_key_page_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/mcgraw_hill_anatomy_and_physiology.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_off000049c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C8 5144 bytes
SHA-256: f2c42bf3d7fede710ed05c054eb6ce695ccb5699e94bed6d6d0a17e7da95ca7f
font_01_sfnt_off00005b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B25 10244 bytes
SHA-256: fd18bafde345b202749095a47349a5b0fe7066348c74c7ad9cf40e6d12aa2076

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