Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3a0d17dce4088b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-21 00:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37e67bc1ce4cafb172b389a33fd277f9 SHA-1: c1c9a2e6c6a1788394de21bbb140047f67a3d14a SHA-256: 8b3a0d17dce4088ba7968a2ce646bbd59c0da8a7dac71f211d02e19bc633da70
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a psychology worksheet. The document body, though heavily obfuscated, contains the same lure text and URLs. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links points to a link farm or redirection strategy. No scripts were extracted from this sample.

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=inside+out+movie+analysis+psychology+worksheet In PDF document text
    • http://files.geostructuralengineering.com/uploads/1/3/1/3/131382387/2387774.pdfIn PDF document text
    • http://desupigu.retroca.com/uploads/1/3/0/7/130739892/7854976.pdfIn PDF document text
    • http://sepuked.greenfielddevllc.org/uploads/1/3/2/8/132814989/1db2a.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/1/0428/5664/4774/files/39468689894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/fudumawowikesubafanuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/wobewugajaviwot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/33219174180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6663/6953/files/62256530586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/nugevogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3997/1738/files/polar_coordinates_worksheet_kuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/42685137029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/71421120504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0244/3422/files/fademavotedemokiminawut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6502/files/8039553906.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_off0000612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 5744 bytes
SHA-256: ccde1225abfe9ff2a9fa955ab03c9e627fd449474a53a4ac9c74b2f6f390b8eb
font_01_sfnt_off00007495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 9924 bytes
SHA-256: c6ee519c73bc20b01f81d4874e3ad024506be0861ef7ddc3b1c6f52f79a945ee

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