Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdd02fbad5fbdad…

MALICIOUS

PDF

55.1 KB Created: 2020-08-09 03:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a27493b1cf2cede07fd4d93d6478604f SHA-1: c24975c0e8ee2105784350f90f3e65cddb51cd75 SHA-256: efdd02fbad5fbdad487fc4db710fe190e9146e9df08174cc7c2ab022159b25a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector (ttraff.ru), which is likely used to obscure the ultimate destination of the payload. The document body contains garbled text but also includes the same redirector URL, reinforcing its malicious intent. The presence of a large number of external links, many hosted on Shopify, suggests a link farm or SEO poisoning technique to distribute 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.ru/pify?keyword=backpacking+recipes+pdf In PDF document text
    • http://kitub.blaznhotaustralianshepherds.com/uploads/1/3/2/7/132712358/2707564.pdfIn PDF document text
    • http://files.unitedjudooftampa.org/uploads/1/3/1/0/131070231/63ff1d9059f.pdfIn PDF document text
    • http://files.photosandfootnotes.com/uploads/1/3/0/7/130775934/rejumoropafixaxagol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sefumiwizekoreletete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/warhammer_armies_bretonnia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/how_to_delete_commits_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/76386049044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/wupuxulujixib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/mercury_smartcraft_gauges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42479515564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/49520909967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/21051451506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000824f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 5000 bytes
SHA-256: 54c299304dee81662a0a94687b021eed62f39bb0bc9fbe492d0d80883c117c0e
font_01_sfnt_off0000934e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934E 14580 bytes
SHA-256: c20a3ea56e87d05d4dfe5c3d9270332a5358c2e1bebdf21c6afefcfd6f95eedb
font_02_sfnt_off0000c103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC103 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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