Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb076aa927917219…

MALICIOUS

PDF

42.6 KB Created: 2020-09-11 05:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd9f5f2643cca344e98cf401e78904ef SHA-1: 5b3cc8a52ea129dd4842d457e21b1c61b80100fe SHA-256: bb076aa927917219b46a04d4525749420a8639f13f617d1a9754bedb1ce71e33
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=android+activity+example+github', suggesting a lure related to Android development to entice users to click the malicious link. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a malicious redirector, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to distribute the malicious payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=android+activity+example+github
    • https://static.usrfiles.com/ugd/49be48_3ffe97a791b9483cb5d3df08fb3eb4b4.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_c0cbb127c82643768dc63ee3da98b220.pdf
    • https://static.usrfiles.com/ugd/de9003_939ca96776be49d9a1203016df7c1958.pdf
    • https://static.usrfiles.com/ugd/50c35f_ca3a6c002b4b41b6b5130cde1eb12fc1.pdf
    • https://static.usrfiles.com/ugd/70094d_51d4898c92b9490d876689f4d731a87e.pdf
    • https://static.usrfiles.com/ugd/b88e3d_ead15c75638646518a8b5bd515f29197.pdf
    • https://static.usrfiles.com/ugd/09273f_b83eeec459dd47a782d4fd8af79b434d.pdf
    • https://cdn.shopify.com/s/files/1/0462/3669/6736/files/2556063840.pdf
    • https://cdn.shopify.com/s/files/1/0465/4366/7350/files/45561047737.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/11663884619.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/spread_spectrum_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/49990342692.pdf
    • https://static.usrfiles.com/ugd/d54300_9da58b9367324a19a7687fdf80b3ab01.pdf
    • https://static.usrfiles.com/ugd/dcf311_ef7cdbadacd2419b97f1bc7f7e435b9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5bff551fbbd4fc29a7de37c78ab62e0.pdf
    • https://static.usrfiles.com/ugd/6e13d9_ca965c7556d941a6afaee9aff84513dd.pdf
    • https://static.usrfiles.com/ugd/80c1db_54205deeed78410b9ae2380cabd589eb.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/
    • https://static.usrfiles.com/ugd/d54300_9da58b9367324a19a7687fdf80b3ab01.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ea.bin
dc8fa9c514358bdb5189ca677969eb025f4f981132b8c8f51576631f2d81d85c
pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 5668 bytes
font_01_sfnt_off0000791a.bin
f5071430ead9e3d4fdcc04cee0e3582a7a02f584f06f34c05f2d80a678d77eb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 10560 bytes