Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a3c2a44d15cb44…

MALICIOUS

PDF

35.4 KB Created: 2020-07-31 15:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df458bd0931a8cacf90c415d0fa5cf8a SHA-1: 691a887efa7b2145e0497ed2e50d3b2c7718f966 SHA-256: f2a3c2a44d15cb447f1eee31aacbbf31c8d90ed8060f489111310e50f2a6613f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a search result for "Blade runner putlocker". This link, https://ttraff.cc/pify?keyword=blade+runner+putlocker, is designed to lead users to potentially harmful content. The document also functions as a link farm, embedding numerous other PDF files hosted on Shopify, likely to obscure the malicious intent and spread traffic. The ML classifier 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.cc/pify?keyword=blade+runner+putlocker
    • http://files.condzellasfarm.com/uploads/1/3/0/7/130775102/sowitobol_gupaluzabupa.pdf
    • http://files.killingtonwinefestival.com/uploads/1/3/1/6/131636957/duwigineduxiwoneli.pdf
    • http://files.asimpleido.net/uploads/1/3/1/3/131384573/4425248.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/11318764023.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/24492347530.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/2429170664.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/xugexaboneroteratemafit.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/41131619558.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/duzurewof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/balidelurapufotexuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/cadaver_exquisito_agustina_bazterrica_pdf_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/91343085727.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/15943166430.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d9c.bin
9670ffdc0e4e342126cf6084f574675c4d2d8fa3489773b621f37cc7f1b981bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9C 5000 bytes
font_01_sfnt_off00005ead.bin
857a48d472fe4927a9105bc917e60866584cc2d3852b4e819a3c6e315afca845
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 10108 bytes