Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae8154f57245a63…

MALICIOUS

PDF

46.7 KB Created: 2020-07-25 18:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e5be2a289dc2835639ec26b85610f16 SHA-1: ccb85e32f92737c62ff44491c52307351ddf8947 SHA-256: 6ae8154f57245a630c9510789bde5ff91c0532cdf8945270438b57b61e4e76f0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to a car manual. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=audi+a6+allroad+2017+manual
    • http://files.pippaspilatesstretch.com/uploads/1/3/2/8/132814241/rebiwogafamujoba.pdf
    • http://files.beeffoundation.org/uploads/1/3/1/6/131637034/dadigaguxa.pdf
    • http://files.pennyroyalplantation.com/uploads/1/3/0/8/130813516/115515.pdf
    • http://files.thesummitclearfork.com/uploads/1/3/2/7/132741136/f168a4e36226.pdf
    • http://files.ourhousecallvet.net/uploads/1/3/1/8/131857071/semosi-kimixasobal-baxokuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/bufijawimutujiweketobik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/magesovekixojogarekebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/wubus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/84428503554.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/xemisexajudelanenepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/mimujalegoxutod.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/27558210052.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/17930788022.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/rozarel.pdf
    • https://cdn.shopify.com/s/files/1/0439/1092/2392/files/rulekaxurifag.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_off00007a2e.bin
70686963db9d94bb7ed4d32d3a3405522e0965ee164810bf24aa98ddd115218f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 5024 bytes
font_01_sfnt_off00008b14.bin
18362ae00edc45f89b74f2d064d21673f1767ec416b88cc6a27ad855049775fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 10180 bytes