Malicious PDF — malware analysis report

Static analysis result for SHA-256 032208e60f5b8b29…

MALICIOUS

PDF

37.1 KB Created: 2020-08-03 09:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac2323eaae15a9eba8a716a396219d87 SHA-1: e3bd7f0790e24616a4041e4e2d9c62f6d1031282 SHA-256: 032208e60f5b8b29276ed1d55d2ae76e864bcf67a90c654d8961b82ee5979d9c
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 pointing to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is likely the primary malicious objective. The ML classifier strongly supports the malicious nature of this 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=anime+desktop+buddy
    • http://files.katemathiasauthor.com/uploads/1/3/1/3/131379761/2228638.pdf
    • http://files.pcasra.com/uploads/1/3/1/4/131438392/pogeranabolexug_vurufipefujosup.pdf
    • http://files.mamajbaz.com/uploads/1/3/1/4/131437418/5575322.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1946/7927/files/1967_camaro_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/57854981730.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/jai_ho_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/zomagijewowazoditemuvuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/39872699547.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/68070185921.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/51118197421.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/zikunugafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/dovug.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/dilivelilexekowufugerad.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/classical_mechanics_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/nokidokezidaxupejutekoka.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/88636489052.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_off00005370.bin
48a58b7dd914e8d8e46ff4a3b6605fe861fda4f900856072eccc6e8ac2f4d133
pdf-font-stream PDF embedded font (sfnt) at offset 0x5370 5060 bytes
font_01_sfnt_off0000649f.bin
3323f4d484f8af5dc56640ab627401433d06d1836891d8c3cb9e1f20acdf2901
pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 10296 bytes