Malicious PDF — malware analysis report

Static analysis result for SHA-256 77342e1777c7141c…

MALICIOUS

PDF

40.4 KB Created: 2020-09-05 05:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502a21d94943306fa7f802e12879d9c0 SHA-1: b36efb49bb419379d8bea3ffc3c031f556960938 SHA-256: 77342e1777c7141c753cb1fd18fd5cad8286bbec1c1157b33ed5046f4382c79f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to funnel victims to malicious content. The document also exhibits characteristics of a link farm, embedding numerous other PDF links, likely for SEO manipulation or to obscure the primary malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to harmful sites.

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.me/wix?keyword=cabriolet+bold+font
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/51946945214.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/42853397490.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/82667735603.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/32934609516.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9094cecce29413e8dbf969416a669a0.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/52307175564.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/wogilejuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/zidisanimulalidirurusupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0462/3761/4229/files/bhangar_bhola_jagran_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/83132564287.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000450c.bin
6d52f6808c9cd2074bb894ec52a149470c4f715365cc411c8d98c7f3b8d7e202
pdf-font-stream PDF embedded font (sfnt) at offset 0x450C 4676 bytes
font_01_sfnt_off000054fc.bin
5adc87883dbe34e02ab81be22bb96f79566bc6100167caa2c08cba1f3f2fcdc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x54FC 14492 bytes
font_02_sfnt_off000085cb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CB 4324 bytes