Malicious PDF — malware analysis report

Static analysis result for SHA-256 6590943b215e7aee…

MALICIOUS

PDF

41.7 KB Created: 2020-07-26 11:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff37fe3cbb3fa91c169d8bce223303ad SHA-1: 5f8f478cfb55b632df23ef951e86e6222cf07795 SHA-256: 6590943b215e7aeedd1ff9640b52ec3d4fd61314e21a2a28b4b317f7ac362001
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to a car manual, likely to exploit SEO or trick users into visiting malicious sites. The presence of numerous external PDF links further supports the SEO poisoning or link farm attack pattern.

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.ru/pify?keyword=manual+do+proprietario+citroen+c3+2011+pdf
    • http://files.ontheroadtomarmomac.com/uploads/1/3/1/4/131454165/vikiwaj-duxozolo-rajolajufivuva.pdf
    • http://files.easthamptonartscouncil.org/uploads/1/3/2/7/132740462/6491757.pdf
    • http://files.sustainablewaresonline.com/uploads/1/3/0/7/130775992/golud_nazegugowanawe_zenino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5309/4811/files/bafudipanidebodax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/nipotame.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/58090447117.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/linutato.pdf
    • https://cdn.shopify.com/s/files/1/0440/1656/6422/files/26964666426.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/10965278772.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/pifobabunijakeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/piligabudova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/lifesidegerukag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/51942630020.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_off000065c5.bin
2d8f3cf0b47df6cf6d184628e7ba10237fe7809c3a45d3c9c0e7567ccbab831e
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 5348 bytes
font_01_sfnt_off00007809.bin
ba74abd08481ccde62a435e8b9176616f4b450229dd105ecead657207a825156
pdf-font-stream PDF embedded font (sfnt) at offset 0x7809 9732 bytes