Malicious PDF — malware analysis report

Static analysis result for SHA-256 62acbdf9be6e38e2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-04 01:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69cd7acf07cda878d07f73e4bbb1f05a SHA-1: 74fbe563bfc08c59f80228c4f13c1db2b2589163 SHA-256: 62acbdf9be6e38e2a122578824ec8f3ea04a0ad222a61e97f1e6955b2fdc7fc5
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 hosted on Shopify, and one critical link redirects to known malicious infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the URL that is also present in the PDF's link annotations. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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.com/pify?keyword=usine+acide+sulfurique+pdf
    • http://files.vikkaszone.com/uploads/1/3/0/7/130738637/e812d.pdf
    • http://files.canadianeducationforcongo.org/uploads/1/3/1/0/131070688/kopupusumaripev_pirekudebone_wupegojev.pdf
    • http://files.moonlightcabins.com/uploads/1/3/1/6/131606405/dewoselomob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/83143471728.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/70236514148.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/fundamentals_of_analytical_chemistry_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/0836/0611/files/social_crm_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/autonomous_vehicle_system_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/zazuxukokowaromizulavosi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/the_one_ring_rpg_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/90435316792.pdf
    • https://cdn.shopify.com/s/files/1/0433/5812/6245/files/amortissement_comptabilit_cours.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/sulivovogunobukodobakujo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4637/7374/files/17201421633.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/98519545316.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/84844279301.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_off00006633.bin
73a9953125abaccffd53434832cc33bb702f9765cce40ffa5bd9a2c6148d03d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6633 5264 bytes
font_01_sfnt_off0000782e.bin
7f744a5420751786c2f4682c41076154c63a1ffb4867b6efb6443593c1811b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782E 12440 bytes

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