Malicious PDF — malware analysis report

Static analysis result for SHA-256 06119a604af229fb…

MALICIOUS

PDF

73.1 KB Created: 2020-09-02 02:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 081a1cda8c6ed161c4631ffe2ba8209a SHA-1: 70bc1447c6feb72656bd2eaf7c344ddb991d1376 SHA-256: 06119a604af229fbacaded45e9a76e9cbfbe77679a7ff1445fe761d3a50956b6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is an appraisal report example, likely a lure. The presence of embedded URLs and the heuristic firing for 'PDF_MALICIOUS_REDIRECTOR_LINK' indicate a phishing or redirection attempt.

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/wix?keyword=uniform+residential+appraisal+report+example
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9595/5358/files/komegofenubamoxoxozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4338/0631/files/tutorials_in_introductory_physics_homework_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/16431444130.pdf
    • https://cdn.shopify.com/s/files/1/0433/5825/7306/files/wutagevuwoti.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/tagojovizolijewuxek.pdf
    • https://cdn.shopify.com/s/files/1/0435/6449/9105/files/mehndi_rachan_lagi_akshara_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2037/files/lonigupanojos.pdf
    • https://cdn.shopify.com/s/files/1/0440/3927/4646/files/event_schedule_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0459/2959/5047/files/98157111978.pdf
    • https://static.usrfiles.com/ugd/1849a1_c7efe2330c034b68a22c2e8f95491350.pdf
    • https://static.usrfiles.com/ugd/6c313a_07254ea839f64018ab11e312d513179c.pdf
    • https://static.usrfiles.com/ugd/d99ef3_1efa257c71d44ba99f33d5242f4142d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/bertolt_brecht_epic_theatre.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/xuvovibadozogakafolisura.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/jorukexomabaxidolarami.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_off0000d848.bin
fe8799bf5804d528078a058d2a3f35b5f9e628304462d3af195e55122cdbcb5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD848 5244 bytes
font_01_sfnt_off0000ea10.bin
eb52457ddce7d8fa330dbe0c127920bb30120a5dc3176041a8ad90a913e49c3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA10 14156 bytes