Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3364ae7f5880fd7…

MALICIOUS

PDF

48.7 KB Created: 2020-09-03 21:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef98a3aca7569f9c24dc9077d509646c SHA-1: 0140ccaee1ee185174dfd6f2a681814be307063e SHA-256: e3364ae7f5880fd7039728ef183442dbd0a55d526b9850c120560c3e955d3192
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a Nespresso capsules guide. This indicates a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious URL is the primary indicator of compromise.

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.club/wix?keyword=nespresso+capsules+flavors+guide
    • https://static.usrfiles.com/ugd/685707_2aaa1c8ce76c4124967d8e1efb94a7d5.pdf
    • https://static.usrfiles.com/ugd/575fb0_51fd5df245af4e1bbb16ecbbe1a4ae98.pdf
    • https://static.usrfiles.com/ugd/ab0441_040e6cbec70d441b9f38e151c9e57408.pdf
    • https://static.usrfiles.com/ugd/ac72e0_0c6290b56fc946c18ddcf9dc819c252a.pdf
    • https://static.usrfiles.com/ugd/895bef_5bd60876c82a4fd1b6a7af8f48d371cb.pdf
    • https://static.usrfiles.com/ugd/3fd21f_f5aca2471b0d4e5089a96b9cfe522cd1.pdf
    • https://static.usrfiles.com/ugd/3e7897_e9c86cc9da22497da904f3e0e87a261b.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/48299011157.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/cessna_310_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2655/files/the_needle_and_the_damage_done_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/casein_in_milk_project_download.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_061b9113b9104b87b3309efd7b12818f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0101ef8a9c1742d981a7ea29c01fd187.pdf
    • https://static.usrfiles.com/ugd/65b209_6b93c258220842a3b10280297313c237.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008175.bin
25543f00893dbdc40e380d0e6da239c009069b91aa736dac5c858da2671f2e0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8175 5352 bytes
font_01_sfnt_off000093c9.bin
61afe87eb0d04a3bf92c526101bae111ed59547c81b416f30f57f1824ef4a3bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x93C9 10084 bytes