Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbffd4c750435b1…

MALICIOUS

PDF

47.1 KB Created: 2020-08-30 23:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9994ece5845605a3e3c9b981b1c41bd SHA-1: a3b8c5bb7662888a0d6848ed9b0c062b70b6da3a SHA-256: 6dbffd4c750435b11a8d232fdc6787a04ab7a32c785e700c02172c18980a5246
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern appears to be redirecting users to potentially harmful content, likely for phishing or scamming purposes.

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.com/wix?keyword=registro+estrategia+nacional+de+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/depafetaxumakurasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/optical_isomerism_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/zopepedeluxomin.pdf
    • https://static.usrfiles.com/ugd/18f527_282def1b545549a6adeec38e3bbd62f3.pdf
    • https://static.usrfiles.com/ugd/510a18_e7215d88d0cb4b27b34206a177de15c0.pdf
    • https://static.usrfiles.com/ugd/724bd4_3264ab856cb64250a936bdbf694d7ecd.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc3e5999a7de4cafb3d8ed7e44dd68bf.pdf
    • https://static.usrfiles.com/ugd/599f1c_a2f64b9657ab444199470bbe572cfa74.pdf
    • https://static.usrfiles.com/ugd/b8c837_8790ce65e1ba4239a656c6b96de2d032.pdf
    • https://static.usrfiles.com/ugd/599f1c_e3fa00f567a24f7d91f7df1d27dc5a42.pdf
    • https://static.usrfiles.com/ugd/432b07_8df4e984a44e4e13822ab980ce24764a.pdf
    • https://static.usrfiles.com/ugd/b8c837_777f775b845b4d4dacec14420ea13f7f.pdf
    • https://static.usrfiles.com/ugd/10a4aa_47b70805d95d4265bfecb53c0718d56a.pdf
    • https://static.usrfiles.com/ugd/c0b427_e369716befe1490db6ec221d31c4e443.pdf
    • https://static.usrfiles.com/ugd/b8c837_356dc075a8df438885c06052ce8c0c88.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_off000076ab.bin
656d23a4eb25ff6fc8551c6047be1fb75a7c402c94d9322e592dfe1972aab7de
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 5348 bytes
font_01_sfnt_off000088c4.bin
d5893b98e2e8dd32153a317ce754c3dd446c3167ab9b3e9b73488a01bca252b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x88C4 11376 bytes