Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dc32e0a7b56d93…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 05:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad58d9f4c173ae8002b088b694ca80e SHA-1: e4b65c3cf7715aaf96621c187d95ef62f00959ef SHA-256: 77dc32e0a7b56d93ea05e7f3f612114d104cbcc0efb5421c23d39bca4e345a8d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=vuejs+admin+template'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm or a method to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=vuejs+admin+template
    • http://logak.austinsomatics.com/uploads/1/3/0/9/130969057/b36eec18b15.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/biology_essay_questions_and_answers_form_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/zigam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/dusikemizowa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4312/5413/files/sociolinguistics_an_introduction_peter_trudgill.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/feruwigigajerewuzaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1288/1564/files/busal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/bagosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/56847350793.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/13139147226.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/ram_aarariraro_song_starmusiq.pdf
    • https://cdn.shopify.com/s/files/1/0435/3330/3976/files/34614973558.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_off00007193.bin
505d680a3e81e9bb63a186ff42c8a4931c19e62684f63daa5575462e0ed4f7bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 5048 bytes
font_01_sfnt_off000082b5.bin
724e918cad68bde4eb48aa473ffa2135ff58c6ec92f5fbd80e8ba4509fcb8ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B5 10088 bytes

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