Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef7b0c0448c82ac…

MALICIOUS

PDF

39.1 KB Created: 2020-08-23 19:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d66f907d9737316f95313a1fbd6c3141 SHA-1: 1b5c1a36ef64517b2f09efd67818a91ec29325ec SHA-256: 5ef7b0c0448c82ac4901984a9436e29202bcfa06a739f96764a94f4d422f0df3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Spider man 2 game free' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link redirects to 'https://ttraff.ru/pify?keyword=spider+man+2+game++free', indicating a phishing or scam 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/pify?keyword=spider+man+2+game++free
    • http://bamef.southwestathleticsleague.com/uploads/1/3/1/3/131381679/1400371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/rejujuraveniwage.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/41350513906.pdf
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/python_parallel_for_loop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/tarot_card_meanings_major_arcana.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/26244404801.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/xuxafi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/matekixobefofomekogola.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/69753072135.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/polymerase_chain_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/greeting_card_border_template_free.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_off00005afa.bin
52ff57e7151389f1343e7a0a15103683ca8f9c473b199a7d8a48ac43eefea9b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFA 5388 bytes
font_01_sfnt_off00006d36.bin
ea7eab8d359db57726d25a50c092bc01a5c091f8e42bdb29617d2e1b1bdaa053
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 10168 bytes