Malicious PDF — malware analysis report

Static analysis result for SHA-256 efda4686aec980dd…

MALICIOUS

PDF

45.5 KB Created: 2020-07-31 12:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 840c90adee59b5a8902df779701ba304 SHA-1: 18d95c5bdae2b2e6cfa3b8534cc5ea30467271bd SHA-256: efda4686aec980ddf25b4afbf4b79085e1be32dd9cca41fa730219088df62eae
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to domains associated with SEO link farms and redirectors, such as ttraff.com. The document body, though heavily obfuscated, appears to be a lure related to a guide, likely intended to trick users into visiting malicious sites. The presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK further supports this assessment.

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=achtung+cthulhu+investigator+s+guide+pdf+download In PDF document text
    • http://files.cimtransformingwellness.com/uploads/1/3/2/7/132740435/lemikizolat-sapopidet-zarezavefid-vokusorir.pdfIn PDF document text
    • http://files.kelleycarney.com/uploads/1/3/2/8/132814024/1911118.pdfIn PDF document text
    • http://files.thejharrisdesigns.com/uploads/1/3/0/7/130776327/mofesu_fosagam_virixonagidu.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/1/0432/9239/3640/files/zamabarodaxawotumavire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/napunajatojazadogimawaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/nolimotadurobaner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/29802971681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/wasub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/48744968611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/99834447262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7709/9939/files/kabadavugunuketen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/74816110866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/1705455159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/mipimujunazogedubifezut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/41440712279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/27382537955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.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_off000072af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AF 5440 bytes
SHA-256: d4bd3132706aeb5922148c5f47e6728d5dfb712ce9d6f46db75b5d75a0ac2347
font_01_sfnt_off0000853b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853B 10268 bytes
SHA-256: 49618f8873d48b01d2c700dd217e149aa285eab093608c1b1d68aed0fbea2764

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