Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b292fe0803caf37…

MALICIOUS

PDF

46.8 KB Created: 2020-08-15 01:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6de5975e8faaf10b32d07c668efbd253 SHA-1: df0ac065e3d030c6d276a3f8be08ed4769d79ba8 SHA-256: 0b292fe0803caf3792389f03a58d039e0f3f2689d6c44ff9d118ea672a1060e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that suggest a link farm or SEO manipulation tactic. The primary malicious URL is https://ttraff.com/pify?keyword=architecture+design+pdf, which is likely used to redirect users to further malicious content.

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=architecture+design+pdf
    • http://jawizifuf.thepts.net/uploads/1/3/1/4/131452977/jevowobo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/fundamental_of_computer_network.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/vemudanifuvigebajajobew.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/marcus_aurelius_meditations_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/vafezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/ansiedad_generalizada_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/20497887502.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/44319932251.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15906675896.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/manilobod.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/lagu_the_chainsmokers_closer_cover_kabira.pdf
    • https://cdn.shopify.com/s/files/1/0430/6334/5301/files/gibomupinivezesamibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/nazorom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d92.bin
5f342fa7d5e43d9851ba942e29055b10e5d6c66a5f00f3922216e382e4c8440a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D92 4936 bytes
font_01_sfnt_off00007e50.bin
49813166f9b0e6cc063723a5d01142dabe6b218d9486a23942bc235ca372d836
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E50 10148 bytes
font_02_sfnt_off0000a085.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA085 4324 bytes