Malicious PDF — malware analysis report

Static analysis result for SHA-256 782ce2862d9ae142…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 22:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 215b6ab119e51470f6d82ac32da58964 SHA-1: 55b8c7c6cf3084df25707cd67f467202b0adea6a SHA-256: 782ce2862d9ae142a2d8e788a18b6d864949dac5075911bf443aec13b9612024
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=auto+format+dialogue+box'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites, likely as part of a phishing or malware distribution campaign.

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.ru/pify?keyword=auto+format+dialogue+box
    • http://files.bymilo.shop/uploads/1/3/2/6/132682039/2404679.pdf
    • http://files.oldtreefarm.com/uploads/1/3/0/7/130776159/6938049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/british_petroleum_history.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/rulepugixibesilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/answered_on_another_device_means.pdf
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/fodunarivifege.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/rogesinodopi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/gemofowoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/edible_gold_leaf_sheets_canada.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/the_day_after_tomorrow_game_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/vyond_animation_software_free.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_off00006712.bin
cc2a04a5e83e1bd26b3914c632849b9684699c52c1238ef4d1969e9e831e7f0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6712 5244 bytes
font_01_sfnt_off000078d3.bin
b98442b0057223fda3743b17d028ab8fb34c6f682556ee7da6b79130c88fbd0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 10232 bytes