Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c765e06fe7d08c6…

MALICIOUS

PDF

46.4 KB Created: 2020-08-15 00:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ba6bd42a82cb2abca7f0c75a18c97ce SHA-1: cc8a55b619d3a956e5c035a19d22eb28c3dbf5d8 SHA-256: 5c765e06fe7d08c64a9d433e5aac1ad667103bbf85c58b71733816fbe302656b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=household+linen+sheet+crossword
    • http://files.glcfaithformation.org/uploads/1/3/1/1/131163533/nutarojego.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/xixesatezaraxivarukoripux.pdf
    • https://cdn.shopify.com/s/files/1/0438/4364/9698/files/gategugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/statistical_methods_for_economic_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/fazulawapitizemimovafafus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/fitgirlsguide_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/stormwind_seasoning_herbs_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/66088314261.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/rizutib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/52746494767.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/41049108477.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/35407289040.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/certificado_de_origen_mexico_costa_rica.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_off00007806.bin
20906d2e52f27339bbaafef42815c5ec09eda5b7b0d868873121a68eff42e06c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 4868 bytes
font_01_sfnt_off00008894.bin
6a5ad29606deed6cfd8b8dd737cd349ba61c55514c5b55e0cf3461c0d9550faa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8894 10600 bytes