Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f1b3f6a1083ade…

MALICIOUS

PDF

34.6 KB Created: 2020-08-03 05:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 430de77d9edd27ea3c26ab9f1de711be SHA-1: bc35fc78b98634941cd80e4ac447bd64d0fdc284 SHA-256: 87f1b3f6a1083ade384880825ce4460662f416c8948f5159ae7cd82dc29ef1e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded URL points to a known malicious redirector, 'ttraff.cc', which likely serves as a gateway to further malicious content or phishing pages. 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.cc/pify?keyword=shik+shak+shok In PDF document text
    • http://files.thekenbrooksshow.com/uploads/1/3/1/8/131856212/xizezaruridepe-vitizunopenafu-daxeka.pdfIn PDF document text
    • http://files.nashvilleweaverwedding.com/uploads/1/3/1/6/131606115/38950.pdfIn PDF document text
    • http://files.lafayetterealestatehomes.com/uploads/1/3/0/9/130968950/097a7521910ba9.pdfIn PDF document text
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.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/1/0428/6716/3302/files/mowiliwupuzekux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/bekexopifilinofuwiponoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3554/files/30705230245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/heroku_reset_database.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/zakewulukufapem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/dark_angels_painting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/gavojof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/vikofugulorovodesas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/xogogepewivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/55430597069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/93368911124.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_off00004e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3C 4812 bytes
SHA-256: 82866f35baf4ed56c266fc878c68329845260c6ecbca23d17b5355d233d61f60
font_01_sfnt_off00005e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 9228 bytes
SHA-256: dca8023fa581e228d6d51aeecdb91237ca05b4b5d9e5be2ced2d99504694ab14

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