Malicious PDF — malware analysis report

Static analysis result for SHA-256 7654ae4142a4c0ab…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 06:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7588a5bc72be28cd9c6f2790b231737d SHA-1: 5e42b7365e0ac59228ba304e04f4f0e69c5f8862 SHA-256: 7654ae4142a4c0abc8481d603533d2a95aee2717f70349ac78f6bfe86a6534b0
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=powerpoint+to+pdf', is flagged as a malicious redirector. The document body also contains numerous links to Shopify domains, some of which host PDF files, suggesting a link farm or SEO abuse tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to 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/pify?keyword=powerpoint+to+pdf
    • http://files.cardconnectscal.com/uploads/1/3/0/7/130738974/fufefarotugimozeroge.pdf
    • http://viziba.hazelarchfarm.com/uploads/1/3/1/0/131070374/f71805.pdf
    • http://files.amsalemlab.com/uploads/1/3/0/8/130814605/zivak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/28321844145.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/90481050300.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/arabic_alphabet_writing_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/14820321507.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/fixewolomela.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/10622598683.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/41830089808.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/botufusikadusebijakaviwes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/12597263174.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/vujir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9754/6149/files/fenarolukuxuvonesumovulex.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/paxiwepusaxubowekuvuzize.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/tonukuvafoke.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_off00006b48.bin
ce1eb2ae9c8a507860c0fbf14f1a661be8184d2cefd234445a6b08bcfcde2a2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 4708 bytes
font_01_sfnt_off00007b6f.bin
ff1cbbf6da9eca160f5eacbdf499235aed5c28ae4d3cdcefb42d2cea30928777
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6F 10008 bytes