Malicious PDF — malware analysis report

Static analysis result for SHA-256 787127aea57f20a6…

MALICIOUS

PDF

59.7 KB Created: 2020-08-11 01:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5c0b40bd3cb6c8879cb22705557ed7f SHA-1: cee057955f78b882fe7ce2c32aaf0e6cb2a3d851 SHA-256: 787127aea57f20a63f5b12a830342f0ede895d176a5711747058eb1c1813e0ee
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.cc, which is disguised as a repair manual. The document also features a large number of links to other PDFs, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious.

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=1999+cadillac+deville+repair+manual+pdf
    • http://files.you-are-the-one-and-only.com/uploads/1/3/0/7/130776327/laninusalegavo_rexupowo_dajopofo_nufesuluf.pdf
    • http://files.ilmbiz.com/uploads/1/3/1/3/131398401/dokerud-dadadegon.pdf
    • http://files.lenapegirlssoccer.com/uploads/1/3/1/6/131636697/8262321.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/kadefuwirul.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/chiraq_meek_mill_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/blender_full_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/babarolisuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/sojaxamokujumuwexugaven.pdf
    • https://cdn.shopify.com/s/files/1/0435/5139/1907/files/pasukatevolerijajog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/amadori_rearrangement.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/deep_web_image_search.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/56202613596.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/nexizimagobafom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/guia_calistenia_yerai.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_off0000a6b7.bin
5e206c7415692d64103e00f096a876c5a9b936d33f55763eef094060da0bafa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B7 5296 bytes
font_01_sfnt_off0000b8a8.bin
2ab93de989a8e773b25a471fb77887bacc1836838bacd96d1558e3df3e49e3af
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A8 11968 bytes