Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7687796288d87c0…

MALICIOUS

PDF

43.4 KB Created: 2020-08-07 03:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28917daf0df18b86df2c1ab49d77b9a4 SHA-1: 6dce82538d59cf011d024e3369c884094de987b0 SHA-256: a7687796288d87c0c9eacfee127db4bbd5c5c80a38cb49a4e146bdd3db43e5f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, designed to appear as legitimate documents. One prominent link redirects through 'ttraff.com', a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious redirection or phishing.

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=importance+of+geographical+location+of+pakistan+pdf
    • http://files.rcwarriors.com/uploads/1/3/1/3/131398097/3047052.pdf
    • http://files.chesterflatearthgroup.com/uploads/1/3/0/9/130969191/c0418b9afb6.pdf
    • http://wanolaten.rawearth.ca/uploads/1/3/2/6/132681947/ruxabevuloz.pdf
    • http://files.shaymontgomerysoccer.com/uploads/1/3/2/7/132710704/b9c739.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4316/files/zokokibilugewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/descriptive_writing_essay.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/86496164109.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/boule_de_suif_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/rizepujat.pdf
    • https://cdn.shopify.com/s/files/1/0438/2693/8018/files/brief_answers_to_the_big_questions_drive.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8376/files/9808049259.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/jeduw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/starfleet_technical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1452/0995/files/punosedukazenapezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4790/files/89677298302.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/honeywell_thermostats_rth230b.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/dadewikegilefogonibagap.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_off000069dc.bin
c9d4af3fae77811a14314105d36d32b22021a4e114499586cb35f8d4a1a59724
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 5572 bytes
font_01_sfnt_off00007c9c.bin
aa94d97857a987fbe742942e5244cbf4877cda1548eac7e4f187acb7dd1cf832
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9C 10304 bytes