Malicious PDF — malware analysis report

Static analysis result for SHA-256 6087e57d12d5fc48…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 02:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f1492e60a6473f25b0875c9c49cfaad SHA-1: bea9b037c202f17e90e166d02d18e21613ae4328 SHA-256: 6087e57d12d5fc4892cb8a6a05e87c3b4eb9ba7c513ccec0299eeadaf3692165
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.cc, which is designed to lead users to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, suggesting a broad attempt at traffic redirection or SEO manipulation. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is 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.cc/pify?keyword=ct+guided+fiducial+marker+placement+cpt+code
    • http://files.lcanavigators.org/uploads/1/3/1/0/131070152/84f04.pdf
    • http://files.ekosingers.com/uploads/1/3/1/1/131163740/dinadamezit.pdf
    • http://dabovana.smithsystems.us/uploads/1/3/1/4/131454065/2483478.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1748/4957/files/14906192960.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/52449858536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72905654063.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/drudge_rss_feeds.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/92079740683.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/18221927212.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/ielts_band_score.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/92384974570.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/broodmother_dota_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/98547869944.pdf
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/mips_assembly_language_tutorial.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_off00007075.bin
70ce23fe0353b9a72502d56ddf4a0b15533ce120fc9f8a79d98fbf416005ed18
pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 5264 bytes
font_01_sfnt_off0000824d.bin
fdad94992dfd261cbefcd946562fa9d6015281e0fbd0e7da7cc1a5986f85621c
pdf-font-stream PDF embedded font (sfnt) at offset 0x824D 10700 bytes