Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd60d049b801337…

MALICIOUS

PDF

45.6 KB Created: 2020-08-14 14:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06f6f5a8513d98ea822c4857b814183 SHA-1: cfca74c8c9ab60fbf88c9433b8270cd8537e4734 SHA-256: 8bd60d049b801337f97dcb98a72b3ca9cf37bc095a37828cf4460f4e8cbae696
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious websites. The document body, though heavily obfuscated, contains references to 'Canadian visa trinidad forms' and numerous embedded URLs pointing to PDF files, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness.

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=canadian+visa+trinidad+forms
    • http://files.enactusguelph.ca/uploads/1/3/1/4/131453226/sovamaf.pdf
    • http://pupiduz.chilihead.net/uploads/1/3/1/8/131856998/77026.pdf
    • http://files.absolutelyfabulousfashion.com/uploads/1/3/2/7/132710783/vawojuriniba.pdf
    • http://files.janinehartley.com.au/uploads/1/3/1/4/131413148/worusisidevugazidaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/17236957685.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/fixumotoforakazanofutel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/wotajabimuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5271/files/discord_code_bloc_fortmat.pdf
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/49400665560.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13336488851.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/16897311287.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/nexiwiruvununiwotoselu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/human_digestive_system_parts_and_functions.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/arifureta_light_novel_volume_9_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/ccna_dumps_2020_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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007611.bin
bcb27c6d3861698363c1365dd2e5c34f87754673a97998fc28ab9a2e20e7c74b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7611 4988 bytes
font_01_sfnt_off000086f5.bin
fef3edc25728131b64fa78e7a166f823990f83f254e66943731fe6246ff317b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x86F5 10136 bytes