Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fe83a8ecf93c26…

MALICIOUS

PDF

53.3 KB Created: 2020-08-04 14:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 120ef5575adbe88818047f34cf5ac37a SHA-1: 855211bdd44e2dc66752c9438eb6bfad7f11adba SHA-256: f8fe83a8ecf93c26019cb80673a10f7f439aa1c6fd3d5b8a5af49408e6aeea28
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=chemical+bonding+practice+questions+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to "chemical bonding practice questions pdf" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

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=chemical+bonding+practice+questions+pdf In PDF document text
    • http://files.asimuk.com/uploads/1/3/1/4/131410370/ce1d8b.pdfIn PDF document text
    • http://files.southernmiddlemusic.com/uploads/1/3/2/7/132740923/6806647.pdfIn PDF document text
    • http://files.rattlerrepros.com/uploads/1/3/0/9/130969116/kavulojevoxozi.pdfIn PDF document text
    • http://files.riponcitybonfire.org/uploads/1/3/1/4/131437091/7748284.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/1/0435/2779/8943/files/simokita_glory_days.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/jutifowetevamumixolibod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/69699173167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/kibajinetomezivozexakoxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/62096624960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/xovegebiwukenupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/wadokowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/peselalavizosig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/98961682583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/gigaguzuwer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/winchester_model_1200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/morijusosajajobop.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 7

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_off00009194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9194 5740 bytes
SHA-256: fe4364338cfd41ec33093783628e4a71bf8c54a6c5c95d4b292d3f70ceb3c853
font_01_sfnt_off0000a4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D9 10464 bytes
SHA-256: 1ad96ed439b1a2d90a143fbb6d2cb9a9661a4514930c362dcf5fdd148ecc07ab

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