Malicious PDF — malware analysis report

Static analysis result for SHA-256 43075a58330642d1…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 01:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a742471e386d02d5a7e2f4a0da7d19ef SHA-1: fde784e25a0fdb8b5968a0f0c35d534f6881b848 SHA-256: 43075a58330642d1be31b4dfb34f491ff446aafa3e53747be58b2138ed2f73cb
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cset+physical+education+study+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including several to Shopify domains and two unknown HTTP links. The document body, though heavily corrupted, contains fragments of the malicious URL and references to a 'study guide', suggesting a social engineering lure.

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.ru/pify?keyword=cset+physical+education+study+guide
    • http://files.allicphotographyanddesign.com/uploads/1/3/0/8/130874474/00ab06e5.pdf
    • http://rogiredu.noshbody.com/uploads/1/3/0/7/130738970/kowepuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/distinction_between_curriculum_and_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6840/files/medonozumeka.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/kenasixusuvokajapex.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/almeida_prado_35_bula.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/vedesonoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/sensory_integration_theory_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/tananevanefaxasuduwilim.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5790/files/31245986379.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9637/files/59899937163.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/aamirror_plus_apk_indir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/29943550711.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/lipid_peroxidation_review.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_off0000693d.bin
c4b3d5da963405b76db4ef2ea55f663172468622b892f72e07604ebddc0e56ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 5248 bytes
font_01_sfnt_off00007b18.bin
f6c918a5e2911566bee5186b90d7f1875d124d15676bb68ba30ea9416fa1da02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 10540 bytes

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