Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b299d81141720c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-16 19:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5c1127010ef110beed66af3cf908dbd SHA-1: f77fb6c5d8a46a31243465f275146ce47e068990 SHA-256: 17b299d81141720ca74d65f3de069555afa3da6152ae0c60d03e3be43ea5c1a8
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.ru, which is disguised with a keyword related to a book title. The heuristic firings indicate this PDF is part of a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious infrastructure, likely as part of a phishing or scam campaign.

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=le+bourgeois+gentilhomme+pdf
    • http://files.robertpycior.com/uploads/1/3/2/6/132696155/8646563.pdf
    • http://gamipagi.crystalynhutchens.com/uploads/1/3/2/6/132681579/zegor-jifipib-zuropo-dawosabuxine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/bixarupeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/atypical_child_development.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/56530763306.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/36780449428.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/45241055535.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/56372875852.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/xosomumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/auricular_therapy_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/xamulukuligefulefesunep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/advanced_engineering_mathematics_zill_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/15957828021.pdf
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/82268879405.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/70516553700.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_off000063f3.bin
2f6e80316d94aceff1f13f0dfd5640a95c9a4a03ec6ec88be7be2981d68dc706
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5328 bytes
font_01_sfnt_off000075e6.bin
313e44917460ca1e59e68e1c3abfaefc19999f2e280ebe28ad85a82f68cc8483
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 12624 bytes