Malicious PDF — malware analysis report

Static analysis result for SHA-256 175f82ab3a5a1903…

MALICIOUS

PDF

62.0 KB Created: 2020-08-16 22:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2c6c42d299a357bb7d56bee24c58aa5 SHA-1: a619c1105c73ad95f7d73f616d4e2b4d25ce1603 SHA-256: 175f82ab3a5a1903b4b79629931494e67f326300c1934c0b01630e58a2187a22
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many benign, indicates a link farm strategy, potentially to obscure the malicious destination or for SEO manipulation. No scripts were extracted, but the malicious URL is the main indicator of compromise.

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=google+analytics+tutorial+2019+pdf
    • http://files.matsumastergardeners.com/uploads/1/3/2/7/132740172/wanovulapil-sowukunaze.pdf
    • http://jevexuz.avrilvandermerwe-create.com/uploads/1/3/2/7/132740214/da942af2e6e272.pdf
    • http://ximivisaj.dakeynediscengine.com/uploads/1/3/0/7/130740178/7865041a46209e.pdf
    • http://lijigeted.farmflightaz.com/uploads/1/3/0/8/130814058/152e264ac.pdf
    • http://kilago.equusmedendi.com/uploads/1/3/0/9/130969858/sikawap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/tilasizikagurasod.pdf
    • https://cdn.shopify.com/s/files/1/0454/6284/7640/files/adorno_the_authoritarian_personality.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/88705683735.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/tewutagemojekepikeguto.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/38854211078.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/foruxotojefekuwapuwuxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/kajonoxorewoxuregigijoxav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/verubimetujubu.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_off0000b2d5.bin
3d364779ed538fa284254999c5d9f07435d77a55407a3d81c47cd64079711629
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D5 5940 bytes
font_01_sfnt_off0000c72b.bin
768416272de5234c1970ef189b2a3eb7a0c18d401ebab2346d039da2e9dfc035
pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 10824 bytes