Malicious PDF — malware analysis report

Static analysis result for SHA-256 10567abf9975aa13…

MALICIOUS

PDF

36.2 KB Created: 2020-08-23 08:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb163c9330caf4e0a55acbfee8b230df SHA-1: b83b69218ea49c8185679ea1366a0c71d2334e8c SHA-256: 10567abf9975aa13e07f9bcb053498408408e3ccf0497f20523c42c53a52e3e0
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 external PDF files, indicating a link farm designed for SEO manipulation or to host malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=love+failure+music+ringtones', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links suggest an attempt to direct users to potentially harmful content.

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=love+failure+music+ringtones
    • http://tizige.choengmongardens.com/uploads/1/3/1/4/131406710/kasaforaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5651/9578/files/beach_buggy_racing_apk_mod_rexdl.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/raxeviv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/9446800788.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/dezukufozofejixuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/black_widow_movie_in_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/bivot.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/quadratic_function_worksheet_algebra_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/88113643236.pdf
    • https://cdn.shopify.com/s/files/1/0466/5471/8117/files/debekifesumuwixeko.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_off00004849.bin
769e8bb3d3446f9b978b16d854ad9b23b115782c7c62f3942b6e388f1a086921
pdf-font-stream PDF embedded font (sfnt) at offset 0x4849 5200 bytes
font_01_sfnt_off000059f5.bin
3b88452fa099259ccc60767825495e963ed9747238096c4191d86e2932897705
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F5 13560 bytes