Malicious PDF — malware analysis report

Static analysis result for SHA-256 6241b480caa486f9…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 10:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb3db23d1928d34a59ad1da84464735 SHA-1: 453e6f3503f29bb19a563c2815742384fb12c7a6 SHA-256: 6241b480caa486f99418a809e1b64990fb656072510b31ad7d9a32c983a2e859
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'brocade switch icx 6450 configuration guide' and a URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer malicious intent.

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.club/wix?keyword=brocade+switch+icx+6450+configuration+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8516/6760/files/30912930305.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/woxituzoruwokekogazedaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/23084868026.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/24326851232.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/21167750123.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/sadejepuwatibiwag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/western_civilization_spielvogel_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/dufix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/burger_king_gutscheine_september.pdf
    • https://cdn.shopify.com/s/files/1/0462/6297/6666/files/48516587773.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ginowojero.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_off00005e12.bin
0a157d6a021f0d83d2d38d31eef465a023494e75e1bffd5bb2edfa34dded4d56
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 5968 bytes
font_01_sfnt_off00007281.bin
8e7c249600d01771c5fcfde1ea70ed1bf05e67c103ecc8b8c8e7feca526cf8eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7281 9960 bytes