Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3e6f3933266a13…

MALICIOUS

PDF

48.4 KB Created: 2020-08-05 06:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6241a730319791d4a9583b33f9619725 SHA-1: e7dca3c10e5eb073d76c7d8cef59b45af0dc2c2a SHA-256: 6b3e6f3933266a131c54b68ef30d873b7db2860200a8992bee8bb958c6cc330a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a primary redirector to 'ttraff.com', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a 'mechanical reasoning test', likely a lure. The presence of many external PDF links indicates a link farm or redirection strategy to obscure the final malicious destination.

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=mechanical+reasoning+test+gears+pdf
    • http://files.btbrv.com/uploads/1/3/1/1/131164174/kawijodawazajupupak.pdf
    • http://files.blues-city-kids.com/uploads/1/3/0/9/130969879/27a11e1fd0c82.pdf
    • http://files.gamers-news.net/uploads/1/3/1/4/131406945/ruroju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/33776886960.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/loditobubug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/73618745998.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/motamufiribuvisazesak.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/analyse_swot_coca_cola.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/34369969281.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/jixogopebaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/wopereronixesunosuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/aldi_application_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/sugefaranuripofus.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2384/files/fipinedojezon.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/34258756318.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/vebewuloduzatevijojikowap.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_off00007de8.bin
e8ce0138ee55ec6b5aac2fa95b9fc56850296b2385b2ec1895b0f5fd70d2f210
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE8 5424 bytes
font_01_sfnt_off00009061.bin
5f6e13e22ecd787ff49909a3a38f4ce6351b4896382a3cdca813e2e9b12a2d1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9061 10732 bytes