Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0473b62de615897…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 23:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f1d64469fc3ac8aa7ffe5536c9e79a4 SHA-1: 86b9896cd2b92b11ba4b8e1ea5e705605fd04c39 SHA-256: c0473b62de61589722d03db74f4de80e1773e45256b92b3ce28bd976050f5b6d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cara+menggunakan+multitester+analog+pdf'. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=cara+menggunakan+multitester+analog+pdf
    • http://files.azmusicproject.com/uploads/1/3/2/7/132741339/3004220.pdf
    • http://jaxixili.airowholesalegift.com/uploads/1/3/0/7/130776791/43f69a4.pdf
    • http://files.dixonwebsitedesigns.com/uploads/1/3/0/9/130969573/9076819.pdf
    • http://files.pragmaticpassion.com/uploads/1/3/2/7/132710797/wetakavig-woxugip.pdf
    • http://files.stateofappalachia.org/uploads/1/3/0/7/130739204/9028146a5.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/musutewep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/sapolubitodaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/61018539915.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/zibelutagokatonobogipub.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/4996261253.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/newixovinibinovisigaranim.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/wow_encrusted_coin_vendor.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/sapifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/88632477941.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/52408553586.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_off00007400.bin
1de9ed585e5cd5700c1053fb57ecf30001312259d347fb5d4fa88feda6cb8db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 5328 bytes
font_01_sfnt_off0000860e.bin
36be3274e3ad881a78ac2f902a403dc3167c4a13c99de39b9140e582fd034094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 9852 bytes

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