Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f00866916cbfd3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 03:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 791d873f9f2ff6338b9baf1af7724f01 SHA-1: bde3092f070c3a6de155815871a15430cdadb8dd SHA-256: 31f00866916cbfd3702419bea57579ef2d95b05dbf89f0e8c2467b79ff35dd88
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=addition+of+decimals+word+problems+with+answers'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of many external links, including to shopify.com, indicates a link farm strategy to improve search engine visibility for the malicious content.

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=addition+of+decimals+word+problems+with+answers In PDF document text
    • http://files.rhinotruckparts.co.uk/uploads/1/3/1/4/131406104/roleduvibudapebov.pdfIn PDF document text
    • http://sagives.thecyphersdenradio.com/uploads/1/3/1/4/131483281/gizixojozokig.pdfIn PDF document text
    • http://lokubo.susanmerrillsquier.com/uploads/1/3/1/1/131163664/bazosuj_tesabapune_jorepusojikagom_sukilebebal.pdfIn PDF document text
    • http://fofure.phouka-pugs.com/uploads/1/3/0/7/130775677/1fb5301293555ac.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/1/0436/0149/4179/files/java_array_subarray.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4056/9509/files/badasizakuwevetekofijega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/conduction_convection_radiation_middle_school_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/namakam_chamakam_in_kannada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/pulse_rate_measurement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/nerefowelolajose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5771/7143/files/98879619000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/41829923967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/85440771616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/foxyutils_merge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/karyotype_test.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_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 5616 bytes
SHA-256: e2781b1b60c2c680a5e5457dcb499a7d024dbfcfc754fd20a41403a3afd6b3dd
font_01_sfnt_off00007444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10464 bytes
SHA-256: 5af8ba3bf3189b95470f170d93855e2a2b1f35270ebeeeaa2bcba47be2a07a02

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