Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f506496f0d6355b…

MALICIOUS

PDF

44.0 KB Created: 2020-08-12 06:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d1bd0d9a88763ea59121212e54fad94 SHA-1: d805f6547365becebd36a5f9f3786d4a50c39ca4 SHA-256: 5f506496f0d6355bc75412df14ca8dee00c19847e3b7955fdd2b9b91229cb425
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a redirector to 'ttraff.cc', suggesting a malicious intent to lead users to harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm indicates potential SEO manipulation or distribution of further malicious files. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=importance+of+delegation+in+nursing+pdf
    • http://vimima.simplypett.com/uploads/1/3/1/4/131407406/80639.pdf
    • http://xozofisak.aquinasbmore.org/uploads/1/3/1/3/131380600/kifuparazakag_jutaxogenob_jutunuraresa_xofegekuludabiw.pdf
    • http://files.allfloorsinteriors.com/uploads/1/3/0/9/130969375/kexajize.pdf
    • http://files.oonaghmcdonald.com/uploads/1/3/0/7/130740625/1092232.pdf
    • http://files.hrmattersottawa.com/uploads/1/3/1/6/131637679/dijujinotezudewarav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/xajujopemijosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/lezesavux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/73869105491.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/bawediboxununulopegok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/steel_structures_design_and_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/electrical_lockout_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0449/4698/1023/files/benzoic_acid_uses.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/40042637552.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/accounting_principles_16th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/29863249266.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/77263655496.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/60853155641.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/98405484145.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3d.bin
394a279fa936180ac43318885c70c6afd91f8df62aa67dfab66c6f9a0b03049a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 5412 bytes
font_01_sfnt_off0000817d.bin
9e6f2affec7caa9cdb5b7a93b3668c96c7859602c53e25df42c0260cbdb008f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817D 9740 bytes

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