Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4668ef63471238c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 14:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a66f4a714a3f0fe96a6441dc85b92c25 SHA-1: adb73d027d27cfdfca61d453f5b761c1610eef5f SHA-256: c4668ef63471238cf2a7cdb042f3b8640757ccbba66fcde3fdf9a304aeeae586
194 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body appears to be obfuscated binary data, but the presence of numerous links, including those hosted on Shopify, suggests a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

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=herniated+lumbar+disc+exercises+pdf In PDF document text
    • http://files.hail-vegan.com/uploads/1/3/0/7/130775825/silukevato.pdfIn PDF document text
    • http://peluko.gaggiamanualservice.com/uploads/1/3/0/8/130814297/pinaziv-lewom-lekono.pdfIn PDF document text
    • http://gukof.dannyderrick.com/uploads/1/3/1/3/131380005/f0c3e2719dc7a.pdfIn PDF document text
    • http://files.glitzstudiodesigns.com/uploads/1/3/2/8/132814768/8288125.pdfIn PDF document text
    • http://files.azqualityremodeling.com/uploads/1/3/0/7/130776483/voborufabebi-setufapa-xulovevat.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/1/0438/1619/0112/files/tamobegofivaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/robun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8673/2707/files/doribokubasulobukoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/ross_enamait.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/tuveduzijisulesulabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/detakejiverawulibedel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9847/0555/files/brucellose_physiopathologie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/fimiludamopidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/2108141206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/guxegaribekanewadej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/github_git_bash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/32377359295.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_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 5468 bytes
SHA-256: 1ead3727c65c5f33b6e64f9dd712ad68a1df665afb913e750bed3effafef873d
font_01_sfnt_off00007992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 9920 bytes
SHA-256: 60bcfb3590bbaa127347f36d587879edaeea12234b89a269ff346fd7232a9620

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