Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46b9bef0c2fc47b…

MALICIOUS

PDF

33.1 KB Created: 2020-08-24 11:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2833c1cd1dfa963dedf7578ddc8c43d5 SHA-1: 3bd81484e5a439db15de6e9e2a46dee29aceaffe SHA-256: a46b9bef0c2fc47b942fff1def50e57ceb2bae6bccefb53c74c2d9f838236127
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, including one to 'ttraff.com', suggest a phishing or malware distribution attempt by directing users to external, potentially harmful, sites.

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=rudra+cartoon+hd
    • http://files.postybirb.com/uploads/1/3/0/8/130874102/5b67ac14.pdf
    • http://files.academyatrattlesnakepoint.ca/uploads/1/3/0/8/130873983/furapof.pdf
    • http://files.terwilligercpa.com/uploads/1/3/1/4/131453969/lilebopegizul.pdf
    • https://cdn.shopify.com/s/files/1/0428/8787/2671/files/castlevania_symphony_of_the_night_rom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/fevutazixigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/vepufelujewojedajela.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/15564737231.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6635/files/nedewefavopuliju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/40611895081.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/wezazuzerap.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/71789855688.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/17261839650.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/xenot.pdf
    • https://cdn.shopify.com/s/files/1/0435/5185/0647/files/annotate_ipad_dropbox.pdf
    • https://cdn.shopify.com/s/files/1/0432/6283/6891/files/academic_performance_meaning.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_off00004514.bin
20c12b4593d635bb8a95ac06f69eaca1063f10dffd152a97d7d319e460b74b66
pdf-font-stream PDF embedded font (sfnt) at offset 0x4514 4824 bytes
font_01_sfnt_off00005569.bin
001fa11cc1edbdbca369da5a6de838b568c22d8993b0a3ebc401c58d270efdd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5569 10052 bytes