Malicious PDF — malware analysis report

Static analysis result for SHA-256 005f393d28b5f47e…

MALICIOUS

PDF

52.5 KB Created: 2020-07-28 05:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6825374a59bcf58b3988b00c891dfb13 SHA-1: 32aa78e7a2c03ea6b9dbaa8f7022d06279435d03 SHA-256: 005f393d28b5f47e3921da45d002297f9f173d26fdcbba1bda86e408f7a9f33b
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic indicates that PDF links point to known malicious redirector infrastructure, specifically `ttraff.com`. Another critical heuristic flags the PDF as a link farm, containing mass external PDF links, with many pointing to Shopify domains. The primary attack pattern appears to be SEO poisoning or a link farm designed to redirect users to malicious sites.

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.com/wb?keyword=livro%20adestramento%20de%20c%C3%A3es%20pdf
    • http://files.darkestsidesilver.com/uploads/1/3/1/4/131438111/lidodimogite-lawuburewok-sudoxar-pavomolimib.pdf
    • http://files.creativitycards.net/uploads/1/3/0/9/130969680/faxogufarukani.pdf
    • http://files.iammengdiwang.com/uploads/1/3/1/8/131856949/xatigadimizijer.pdf
    • http://files.norwegianbuhundpuppies.com/uploads/1/3/2/6/132681863/5323927.pdf
    • http://files.harrypottervet.com/uploads/1/3/1/4/131407111/vikaxomebewenute.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/64156757640.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/3183010606.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/4772726657.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/95966346719.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/nerokuzefexaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/83634197468.pdf
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/71521051488.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/91847661340.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/wobazenawedivegogoritew.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/jivugejeradedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007580.bin
f35ecb46b78817777a07466b9249b540a1715eaf70bf22c029677b4e78478ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 5376 bytes
font_01_sfnt_off0000871c.bin
d659d68e05f8c27be7394a544532dcaa49ef38ba2e2cffc66441f2856198e283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871C 12612 bytes
font_02_sfnt_off0000ad92.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD92 16164 bytes

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