Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1fee9a011abff6…

MALICIOUS

PDF

59.4 KB Created: 2020-08-19 22:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0c0b8469ed56b60d76ffe80eed268ac SHA-1: dada9ea222f9fcb2c2513beeb31c8a687623d5b6 SHA-256: 6d1fee9a011abff6de4b9fdb57a0bdebb86b65be99ccb081420dce653770115a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged as malicious due to a high number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=guidelines+helicobacter+pylori+eradication+2014'. The document body contains garbled text but includes the same URL, suggesting an attempt to disguise or obfuscate the malicious link. The presence of numerous PDF links, including one to a Shopify domain, indicates a potential link farm or SEO manipulation tactic.

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.ru/pify?keyword=guidelines+helicobacter+pylori+eradication+2014
    • http://files.inyourpacefitness.com/uploads/1/3/0/7/130739910/b2559417161d.pdf
    • http://bavegike.lifebiblestudies.com/uploads/1/3/2/7/132740214/4850252.pdf
    • http://files.backcourtballers.com/uploads/1/3/1/4/131483830/cb154c1f0ca93.pdf
    • http://files.music4peace1.com/uploads/1/3/0/9/130969053/2100019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0676/0856/files/vugotino.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/93646826279.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/bratz_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/3879477464.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/wogewofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/47088064778.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/43530761198.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/13516946585.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/arrl_repeater_directory.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4893/files/microsoft_word_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/wukotet.pdf
    • https://medlineplus.gov/helicobacterpyloriinfections.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a77.bin
05d3c252d01d53e57fb49ba796a40b15b4d86e428cea2ff47b0e90728dd8d88a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A77 5728 bytes
font_01_sfnt_off0000aded.bin
b52d31f2bbf23931103e9ea1fa4dd30e474cd909e519bfe4592187adc504249a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADED 10652 bytes
font_02_sfnt_off0000d210.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 4324 bytes

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