Malicious PDF — malware analysis report

Static analysis result for SHA-256 f016ea88496cd132…

MALICIOUS

PDF

66.1 KB Created: 2020-08-03 14:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d9801ec2b8343fdb3b2881a1f4b1269 SHA-1: eff54147217bd0d5608c695a1242acedddb4d524 SHA-256: f016ea88496cd1328f4ff0012cf23845cb6eec9d2798c0fc934b3959f489a406
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'topological insulator review pdf' and includes the malicious URL, suggesting a lure for SEO poisoning or phishing. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=topological%20insulator%20review%20pdf In PDF document text
    • http://files.joyfullittlecatholics.com/uploads/1/3/1/4/131406811/kusoles.pdfIn PDF document text
    • http://files.eastlondonkempo.co.uk/uploads/1/3/0/8/130874252/pozubi_zedivevokepezam_lemifesute.pdfIn PDF document text
    • http://files.jimpendergrass.com/uploads/1/3/2/8/132815961/xabixejeje-nenowapiwage-jisematonalon.pdfIn PDF document text
    • http://files.aceofadams.com/uploads/1/3/2/7/132740327/moxagituwevolobe.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/1/0433/9027/1638/files/javijapebid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/gozofigufotiwexigedode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/lugelipegenefolovawage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/fugidonitenawasipufiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/pisiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/44923114643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/gekeluzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8177/6795/files/72210107567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/ribawobitutibef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/9248179925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/29061832694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/libib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/43960522884.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_off0000c396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC396 5424 bytes
SHA-256: 95efcc016f75bc841a11a57ab6b280c53cfc2d7f2bfb21021c698269a69eaa53
font_01_sfnt_off0000d631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD631 10936 bytes
SHA-256: ce51c2c0e6e11ef45c4e8b6e20f68a6394ac0dbb4cdb96350fef1e619ce99858

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