Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e91bc662b5531c…

MALICIOUS

PDF

57.9 KB Created: 2020-07-31 08:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e926e7cdec3591667298889618682ef1 SHA-1: a3e22ec9eca326442a331d61cae470980a5aea16 SHA-256: 66e91bc662b5531c47942cdc8c29c0288e453e48c551f6f3769f6aa54dc31b79
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure and is part of an SEO link farm designed to lure users. The embedded URLs, particularly the one pointing to 'ttraff.com', are flagged as malicious redirectors, suggesting an attempt to lead users to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'free download', reinforcing the phishing 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=aadu+valarpu+tamil+pdf+free+download In PDF document text
    • http://files.7thgradescienceworld.com/uploads/1/3/0/7/130739750/861732.pdfIn PDF document text
    • http://files.loveandorthodontics.com/uploads/1/3/0/7/130740017/zejipater.pdfIn PDF document text
    • http://files.clearpointtechdesign.com/uploads/1/3/0/7/130775191/2463142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/wenotapujunukezewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/29191226197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/11842394166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2772/6489/files/8967212484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/11174691023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/16474771481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/1566407847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/84896791356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/kaman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/fonow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/91613587823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/7947699526.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 5032 bytes
SHA-256: 961b7a943955b488a2179239e816da09e2cbe3fcfe73e7040c6836f7d9e25af2
font_01_sfnt_off000089a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A9 13576 bytes
SHA-256: 950d8db4fe73fac059d99caeecc7a6e966c14a44911b076c53cac40434679c88
font_02_sfnt_off0000abb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB3 14564 bytes
SHA-256: 0c998621ce2a857a9305ab771d1c5afa90daed6d4176272e421d290c7406474a

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