Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a95292630199bba…

MALICIOUS

PDF

106.0 KB Created: 2020-08-21 10:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b152438af2bc4d68921806413072143b SHA-1: b2285260b2d51b0f0e31917efa9ee5cf40cccb12 SHA-256: 4a95292630199bba08ab062272b44a566285324a54f15c38831fa786ab16696f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. Another critical heuristic noted a large number of external PDF links, with the first identified link pointing to 'cdn.shopify.com'. The document body contains text related to 'Bootstrap 3 columns form' and 'wkhtmltopdf', suggesting it might be a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bootstrap+3+columns+form
    • http://files.dos-beachwear.com/uploads/1/3/2/3/132302916/susovukipapu-vedadomivorepe-bopafenuresun-gapudoxufebuvi.pdf
    • http://goropova.solarancestor.com/uploads/1/3/0/7/130739140/worofovokepatotika.pdf
    • http://seduvirif.symmetricallybeautifulbysalina.com/uploads/1/3/2/6/132683003/tabiboxifonabun.pdf
    • http://files.kelvingibbons.com/uploads/1/3/2/6/132695445/zawupamu-jopezimununen-losito-gonoxavibunuse.pdf
    • http://tezin.hrmis.es/uploads/1/3/2/3/132302780/zokenixivol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/31323076467.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/42681182275.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/27104471325.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/sasotogipotetogitifotuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/65085461399.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/dissertation_guidelines_uom_fema.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/t300_key_programmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7975/files/mid_rivers_webmail.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/biretuniv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a2e.bin
31d1c57ecb443a02f23bce154f313d128bf7227ae10f9bb5cdb7a2d3b2d254c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2E 5372 bytes
font_01_sfnt_off00013c56.bin
3b4f81cdaa7b44726c8a9eb1fcf18f478e11f7a76d11411e4911e09b85c4d164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C56 6520 bytes
font_02_sfnt_off00014e4a.bin
63e7d6708ec71f603b18ae06d551e2e344431e9337cf49d8ab9cb831d890c726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E4A 17004 bytes
font_03_sfnt_off0001834c.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1834C 16144 bytes

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