Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ba0634344ab723…

MALICIOUS

PDF

47.0 KB Created: 2020-08-13 03:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d6fbea8651c642771da765edd70781 SHA-1: 2c2259a11ea589f0fee23c7086b295a9acfaed11 SHA-256: 13ba0634344ab72342bd9196c1211072e7e3dbdc15390edc427126144155308c
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 of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains URLs that are likely intended to lead users to phishing or malware distribution sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=definition+of+applied+ethics+pdf
    • http://mawuw.kingston42.com/uploads/1/3/1/4/131438759/bakolakito_denenaruf_gutopojonafiz.pdf
    • http://files.bothwellfarms.net/uploads/1/3/2/6/132682882/a2b38f8b6.pdf
    • http://files.pacifictraininggroup.com/uploads/1/3/2/6/132682441/7d91c07658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/95538836392.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/ibps_rrb_notification_2020_freejobalert.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/cbse_affiliation_bye_laws.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/27881765200.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/31312744414.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/1100726925.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9461/files/87015374100.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/lupimetaruteradawubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/78921297250.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/29177394401.pdf
    • https://cdn.shopify.com/s/files/1/0434/2605/4306/files/83213390647.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/nizimoleloleru.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/88673319178.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_off00007a29.bin
0e3af551ccbf2a90a1e0207f54a763f048b8692852a6bb489552f53eebc115fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A29 5148 bytes
font_01_sfnt_off00008ba7.bin
28a8b3bfb28a4f4d63626a3fa938824ab4e573e0b0727d76eb7dc6280777bfb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 10412 bytes