Malicious PDF — malware analysis report

Static analysis result for SHA-256 32af213b3ff17dac…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 22:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 104bfd20e8985bd1f189b30da6c7a39f SHA-1: ce2b8bde8a4395de660a7c27528c9935cb78980c SHA-256: 32af213b3ff17dac47365813ed38e0763045d25a86ff1a8bdb373718f305e959
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body and heuristics indicate a link farm strategy, likely to improve search engine ranking and lure unsuspecting users. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious 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.cc/pify?keyword=byron+katie+books+pdf
    • http://files.nkshoporlando.com/uploads/1/3/0/8/130814605/1b0c4d98aa4.pdf
    • http://files.summerfoxart.com/uploads/1/3/0/7/130776082/vudidaniwenirid.pdf
    • http://files.acottagebythesea.net/uploads/1/3/1/3/131398547/fikab.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/kukanekukuraret.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/lutobepadike.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/zowut.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/zufefujasoleko.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/godedetoxapolekiwija.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/gefexokigigonajedeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/49752222394.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/6778026500.pdf
    • https://cdn.shopify.com/s/files/1/0433/3463/1579/files/89868963737.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/rofufemitalaxikojojox.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/50434758207.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/sejejaxenerivezuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/75860505445.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006399.bin
fce46406a44db333b296fb7207540f986a70d069310dad0284b229057aeff0c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 5356 bytes
font_01_sfnt_off000075ed.bin
55d7141e2b6eeeb858a9dfd27fab92da716b4dc9364888b1856bc44387cae03b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 10244 bytes