Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94edad7d93e46e2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-25 15:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a718f624d6e27d03b967d93faa5ea80 SHA-1: 6516fe598af4b56f2ed1ef6cbb2994adbe9e9487 SHA-256: b94edad7d93e46e227414862e8ec1390c499625d61a3beb39349289c49c47d97
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=chrome+setup++for+pc+windows+8'. This URL is presented as a download for 'Chrome setup for pc windows 8', a common lure. The document also exhibits a PDF link farm heuristic, with 26 generated SEO PDF links, many hosted on cdn.shopify.com. The presence of a visual download button further supports the social engineering aspect of this attack.

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=chrome+setup++for+pc+windows+8
    • http://files.cafe210.com/uploads/1/3/0/8/130814353/3a77fb9.pdf
    • http://files.bethelchurchipm.com/uploads/1/3/2/6/132695601/pudugux-pawatovis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/libivose.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/ccsp_2019_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3499/9975/files/dasowivononorawuwuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7621/3141/files/example_of_introduction_psychology_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/wipavidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/54434294812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/airport_time_capsule_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0460/5791/4523/files/25270742791.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/21_sheet_street_surgery_windsor.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/nijuduzagaxaretid.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_off00006da7.bin
cea41f84a171259a6a4ff77cfa4200ecc39090418a6a0b89f39d1fb8b0940f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 5344 bytes
font_01_sfnt_off00007fcb.bin
996f4de4e5e3dce444d12f9c642121d5514f59537164848d72146b9cb78116c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCB 10304 bytes

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