Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c8aad1fb49c8f6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-26 18:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 195391bc698bf62885a2182c53b6d5f1 SHA-1: 268774c64d523f2426cdd0a06ae7dba5c7d16026 SHA-256: 69c8aad1fb49c8f667039024b5f158d303ad452991ef2decd9ce5aad27d90573
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for a product manual, likely intended to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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=inovix+ipocket+manual
    • http://files.crosslakekids.org/uploads/1/3/1/8/131857315/7385075.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/janibop.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/80138439960.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/jadetebinobine.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/xofujiweseximejeror.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/el_embarazo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/gumuvofapinizobazesojokow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2578/files/domijelumade.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/back_stretches_for_pain.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/excel_cdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/1750919746.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/anexo_3_oaci.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_off00006a43.bin
ca4d339dec1ff9b1ac1265c174ed59b461d69e50ff0259fd84fb18d43fc7bebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A43 4936 bytes
font_01_sfnt_off00007b02.bin
6f974d6e9bc5a3f335ece66de33379926ba5cc7a9b3148407bb2d3d859c2aea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 10560 bytes