Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c977ff97d22ae5…

MALICIOUS

PDF

35.0 KB Created: 2020-08-15 03:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05937ad450a3292ded785ffe1a1dc4d2 SHA-1: a85f43fb8bb05aeb874ec58e4631664c3c58cf3f SHA-256: 87c977ff97d22ae590a5787b4b5b4ff8bcf2580bc01927606908ccf86eb682b1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector (ttraff.ru), and is flagged by heuristics for being a malicious redirector and an SEO link farm. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users into clicking it for a supposed free download. This pattern is consistent with phishing or scamming attempts.

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=libro+de+biomagnetismo+medico+pdf In PDF document text
    • http://files.cjaudiology.com/uploads/1/3/1/1/131164425/jamifimixuwix_zajoroko_lazufaba.pdfIn PDF document text
    • http://files.channamalkin.com/uploads/1/3/1/3/131383737/mivomolasu.pdfIn PDF document text
    • http://lunizile.ruizcombatgrappling.com/uploads/1/3/1/0/131071252/9051b6e404f9423.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/1/0430/0665/6666/files/15613775221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/22904252234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/sifezilibobonenon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/bible_history_new_testament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/47466125440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/moruwovedopupobex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/principe_d_une_alimentation_quilibre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/certificado_de_secundaria_sep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/infarctus_du_myocarde_symptomes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/22668997792.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 5

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_off000047d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47D3 5524 bytes
SHA-256: 7a12a70f2556472dbee535d3d59d0f7248f78dbba178d7a8d3548b6922b721e7
font_01_sfnt_off00005a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A81 10804 bytes
SHA-256: 1dc31a5e4d5faa8be2ce2ad4210b8d4d845b66e1b3353c23c0c91ede757e9669

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