Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0e91c87b9d847e…

MALICIOUS

PDF

52.8 KB Created: 2020-07-31 08:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7707a12aa70ea13a04321de6b668a97a SHA-1: 01761a3a390e8753d66056bafb617c9ab39aa188 SHA-256: 9f0e91c87b9d847ef114ddc0fdf55e13d16fa8e08d535f2de64a47eff6080478
128 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector hosted on ttraff.ru. The presence of a 'download button' heuristic and the embedded URL suggest a social engineering tactic to trick users into clicking the malicious link. The document body is heavily obfuscated and appears to be generated content, likely to mask the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=uml+activity+diagram+example+pdf
    • http://files.jessicaritacco.com/uploads/1/3/1/1/131163492/gitaxurekemuvi.pdf
    • http://files.casa-collective.com/uploads/1/3/0/9/130969768/7834245.pdf
    • http://files.impactdesign.co/uploads/1/3/1/4/131483031/6393183.pdf
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/duzosizezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/lofalu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/65353825967.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/gotob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/zunusijelewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/69247548173.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/55815088097.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/walojizaxisunukevaliwenet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/92059520220.pdf
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/kojifumofokebubemeketim.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/babafutafigunaledu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/66951033887.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000916c.bin
09e9ec54c4045a6a88bb90488349d4f1d167259e35265ce8cefa20f854aded66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916C 5092 bytes
font_01_sfnt_off0000a2cf.bin
93caded165a3aa6d116dfb39221b496bf234deda4d8ed5f90a62fba14054761b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2CF 10404 bytes

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