Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e7f762c020a644…

MALICIOUS

PDF

37.0 KB Created: 2020-08-18 19:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6d1d36db059b3ea5eef819ebca878ff SHA-1: e5d9ff5ab962c6b6236af36bfc7db9df17bba5f5 SHA-256: d7e7f762c020a644f32e9ed0368b4c81eb2c340c2ff293804d47e034c29529f1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Bonus form d format in excel' and the malicious URL. The PDF also hosts a large number of external links, many pointing to Shopify domains, which is indicative of a link farm used to obscure the true malicious destination. The primary malicious IOC is the redirector URL.

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/pify?keyword=bonus+form+d+format+in+excel
    • http://piweg.blaqpyrates.com/uploads/1/3/0/7/130776677/wirux_voguwixalanid_bafef_linudukuxesoruk.pdf
    • http://files.cantonfitnesscenter.com/uploads/1/3/1/6/131606923/nokano.pdf
    • http://nixoxufi.qualityatease.com/uploads/1/3/0/8/130813108/vowopodewopalik.pdf
    • http://pupud.lucdphil.org/uploads/1/3/1/3/131398003/10b3f0954b4.pdf
    • http://rupuk.juliezack.net/uploads/1/3/1/3/131383900/mowuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/61717704359.pdf
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/34385213883.pdf
    • https://cdn.shopify.com/s/files/1/0458/5432/6937/files/pexuburex.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/63763242088.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/fegigew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/22494614513.pdf
    • https://cdn.shopify.com/s/files/1/0446/8441/1033/files/allred_scoring_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91025233068.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/ponibazokaso.pdf
    • https://cdn.shopify.com/s/files/1/0445/1749/0847/files/muvesa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/nys_dmv_permit_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/nenenurefex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/23215741520.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_off00005244.bin
5964bf4b01af0af6a7a7d83eba397f7c88becd71f564a1a53689cf489bf431e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5244 5284 bytes
font_01_sfnt_off00006424.bin
28966db88b8ff4f21749f0b7e7696b42b0c6a72f75eb383fb859c5e6f3c357cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 10136 bytes

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