Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec1afe0016cca81…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 20:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3eb9bebe20948ba5a2775b4b23f251e1 SHA-1: 841fefef0802230fdb8b7f96deb65f3fd04d33d1 SHA-256: 4ec1afe0016cca8159788bfa6a6a7b2bb0de7a08517db5054efa10848e304bf9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links, many of which point to what appears to be a link farm designed to distribute malicious content. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=although+in+spite+of+despite+pdf'. The document body itself is heavily obfuscated but contains the same redirector URL, suggesting the primary purpose is to redirect users to malicious sites.

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=although+in+spite+of+despite+pdf In PDF document text
    • http://files.holisticbirthandbeyond.com/uploads/1/3/0/8/130874474/7cb57.pdfIn PDF document text
    • http://files.mistynielsenphotography.com/uploads/1/3/1/8/131872298/vuzevefabajivu-lamedilajuza-fuporoke.pdfIn PDF document text
    • http://files.starlitelabradors.com/uploads/1/3/2/8/132814930/zojinufeta-megifariz.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/1/0433/6893/9672/files/4053599924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5634/0890/files/63918480512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/jurepivepaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/86535715125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/fuxodaguwewadagepoxipeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/vajuvufisunad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/osrs_chinning_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/twitter_player_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/gisadaravipelaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/77131586374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/90876843906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/pokemon_soul_silver_walkthrough.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 4984 bytes
SHA-256: 836f1caeaf7ef4e16977157f9d5f6ef769b7ec247f6e3d0115d56ebcaee4b8db
font_01_sfnt_off00006f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 15124 bytes
SHA-256: 0cda680ce0c87c1f8a859d2c38a139b81794e593a5f1dcd93765153532aa28fd
font_02_sfnt_off000097dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97DC 16136 bytes
SHA-256: 44de0d2cd4f8fa712fbd5b62645e9da6f20b65b6a9e620d93dcf676172b95344