Malicious PDF — malware analysis report

Static analysis result for SHA-256 84cffd20d26f51e3…

MALICIOUS

PDF

41.8 KB Created: 2020-08-01 20:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 344d36859af8c82a6588e97c55b45a1c SHA-1: 6c6efddab9f7dc14ab3549c4563b111cbefff255 SHA-256: 84cffd20d26f51e394fc833c37e6d805959b6047dabe12b0acd81c5c50dc5a9e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to distribute malicious PDFs. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution lure.

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=avery+5167+template In PDF document text
    • http://files.karleekilker.com/uploads/1/3/2/6/132680998/fodefajarol.pdfIn PDF document text
    • http://files.spinesurgerycleveland.com/uploads/1/3/1/4/131408581/8e316c1df0a5614.pdfIn PDF document text
    • http://files.geoffpelham.com/uploads/1/3/1/4/131453998/8622246.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/1/0430/5495/6695/files/vozupedujoduxedelid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/57359581398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/gudidapobegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/70270855044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/66964429037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/79640017903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/43538115254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/88387781837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/git_restore_deleted_branch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/maxaremexit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/pafewufivelewefarepidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7162/6659/files/92255885421.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_off00005e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 5348 bytes
SHA-256: 2f449411a3080b1575001fd28fcde56c037cfe4454f32b9164d0cd7e0a720f4b
font_01_sfnt_off000070b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B6 13080 bytes
SHA-256: 2bd3dd54c49139d56a70991e2ef1b940f3faf0063e42268215ab6eb718e11bf4

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