Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b7f083732418e3…

MALICIOUS

PDF

60.7 KB Created: 2020-08-19 10:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c80159fd8cec1e06366add50d970a1b6 SHA-1: a5be959f5ff1e53e7b19aaee17405064c405f464 SHA-256: 81b7f083732418e35de3e0746f1bbacafdb38192cecd9dcb6e034b91250920c2
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.com), suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL that leads to the redirector, reinforcing the malicious intent. The presence of many external PDF links also indicates a link farm, often used for SEO manipulation to drive traffic 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.com/pify?keyword=baelsar+wall+guide+deutsch In PDF document text
    • http://rivijugu.bluewaterfmchurch.com/uploads/1/3/2/8/132814415/jizotabogenonowat.pdfIn PDF document text
    • http://files.bellamcbride.ca/uploads/1/3/0/7/130776152/lamapusiv.pdfIn PDF document text
    • http://xibuf.phesta.nl/uploads/1/3/1/0/131070152/zonovuza.pdfIn PDF document text
    • http://files.nafoglobal.org/uploads/1/3/0/8/130814172/9673174.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/cancer_de_colon_derecho_e_izquierdo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/94017171155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/96197089553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/48060405753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/wirejutip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/august_2020_current_affairs_upsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6567/3637/files/cancer_de_tiroides_clasificacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/whatsapp_for_pc_windows_7_filehippo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/34751014123.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 5008 bytes
SHA-256: 4ad361e39d3a49a5c4d2bf06c84e8ddb6e65b9bab563a9bc15d98292c101f2a2
font_01_sfnt_off0000941b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x941B 14960 bytes
SHA-256: f469a1888b3e24d2aa096cf3c2fffbe8bc509b9a8a72f5b94bea9af35df39b1a
font_02_sfnt_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2