Malicious PDF — malware analysis report

Static analysis result for SHA-256 028ab1432574e082…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 22:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75c9257bdbbbff2739192e9d87e02db1 SHA-1: c3aad0d03065b619449af108ae2cf627fab48c79 SHA-256: 028ab1432574e0826fa87bfd3374408bef3f4e5977f567c4c67f4255435d83b0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to funnel users to further malicious sites. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, many of which point to Shopify-hosted PDFs, suggesting a link farm used for SEO poisoning or traffic generation. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=hazardous+and+radioactive+waste+management+pdf
    • http://zamuf.deltronenergy.com/uploads/1/3/1/4/131438464/tijera.pdf
    • http://files.jeffcrowell.com/uploads/1/3/1/6/131606666/2dcc4.pdf
    • http://valip.clockworkpositive.com/uploads/1/3/2/7/132740892/3446811.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/72580306650.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/kurexufaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/pronombres_y_adjetivos_posesivos_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/tedaroba.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/xesonasem.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/wozeruwer.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/sototiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/zuzizajukigilesawakofow.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8658/files/woxidenoda.pdf
    • https://cdn.shopify.com/s/files/1/0438/7956/3432/files/flash_share_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/california_copy_certification_of_power_of_attorney.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/guitar_power_chords_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6909/6615/files/alexander_hamilton_book_ron_chernow.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/7287966390.pdf
    • https://medlineplus.gov/hazardouswaste.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a9.bin
cfef2df80789b2f7e5ba7cfc13b9d4b91cae2b6cc19bdab338155b8e8b36c3ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 5608 bytes
font_01_sfnt_off000077c4.bin
5e6232b9355015c6d7466ca318baf5fdec548a849d55e66d93f0e1efe3d526d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 10308 bytes

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