Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9de078b545cb6d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 19:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82f0541fa70c04373f867d70aff23bb SHA-1: 5674970968e577efe335e3ede6aaa8ddd4be3a50 SHA-256: 0f9de078b545cb6d1b0e8cf1891cd27e3ee1b4013bc47b8238150506ef19be83
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to unit conversions and the malicious URL, suggesting a lure for phishing or a scam. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent.

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=como+transformar+celsius+em+fahrenheit+e+kelvin
    • http://files.kreativtouch.com/uploads/1/3/1/6/131637218/varaweralefemurubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/pakefosu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/33980561610.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/athreos_god_of_passage_edh.pdf
    • https://cdn.shopify.com/s/files/1/0446/8441/1033/files/wings_of_fire_book_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8070/files/dolomites_italy_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/class_10_science_project.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/m777_howitzer_technical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/killer_been_unleashed.pdf
    • https://cdn.shopify.com/s/files/1/0439/5368/4638/files/indycall_app_for_android.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_off000055e3.bin
22e47e14365b0d20e345b908a1f9ec4d34df0c9eff7d3026096b412bb13f00a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x55E3 5148 bytes
font_01_sfnt_off00006737.bin
e08afd57769cb7e630ae7da74c10f77978270cf5b7e6299d1ba577f503681c73
pdf-font-stream PDF embedded font (sfnt) at offset 0x6737 12400 bytes