Malicious PDF — malware analysis report

Static analysis result for SHA-256 a576f26dd57ea14b…

MALICIOUS

PDF

46.9 KB Created: 2020-08-18 15:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 072bc5ccab25af5f5ac5b2b91d2c041e SHA-1: eeb85897915ac57be921e7d03b462dcafcc791fe SHA-256: a576f26dd57ea14b6db7e121dd3ae0c972496098b44e45bb47fbf1848c7ec856
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results for malicious purposes. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware delivery site.

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=sports+apparel+industry+pdf
    • http://sifufeg.pathfinderprofits.com/uploads/1/3/1/4/131438667/56d11ab9.pdf
    • http://nuxulisol.ccbelfast.org/uploads/1/3/0/7/130774982/062e3e20719.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/globo_play_globo_reporter_tailandia.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/jatikanesikibiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/24730732755.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5104/files/12533335555.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/61886733425.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/3rd_grade_math_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/articles_worksheet_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/zusukapez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/60864231117.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006de3.bin
d9031177b8347abd489caeff73ab3155ddf8a3b9c62ed85ee1c4531f35555e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE3 5120 bytes
font_01_sfnt_off00007f53.bin
514b9c33258a2577bbc32ad393cf86ab445bb1a93eb6e9f9f481038826af1c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F53 9812 bytes
font_02_sfnt_off0000a0e9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E9 4324 bytes

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