Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbe6677ecc3e191…

MALICIOUS

PDF

55.6 KB Created: 2020-08-22 20:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b81348d1b0bc132056f3beeb857a25a SHA-1: df683bd3cc9dbd1f9198e9d25d406a143d7bf0d4 SHA-256: cbbe6677ecc3e19172a519111d4dec8dd0a58f39dba7a3e09c601473859da5c8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=android.+bp+module+missing+dependencies', which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to 'Android. bp module missing dependencies' and includes the malicious URL, suggesting a social engineering lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to distribute the malicious payload.

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.cc/pify?keyword=android.+bp+module+missing+dependencies
    • http://rimedego.garyfrymusic.com/uploads/1/3/0/7/130775934/2873174.pdf
    • http://files.floridaraceday.com/uploads/1/3/0/9/130969440/7114086.pdf
    • http://files.chaseshelton.com/uploads/1/3/0/7/130739918/2820364.pdf
    • http://wogedulep.capstonetherapycenters.com/uploads/1/3/1/4/131407815/wojonapilusekiw_gakuzababurini_vefip.pdf
    • http://files.osteostrongtriad.com/uploads/1/3/1/4/131437508/xupolubirudu_veziregepoduj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/60986813971.pdf
    • https://cdn.shopify.com/s/files/1/0431/8733/9413/files/45536208410.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/79002910999.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/tapabalalamudetivuku.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/data_structures_and_algorithms_course.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/80892012369.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/rovinepene.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/63224544467.pdf
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/60836397564.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/24864429715.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_off00009ac1.bin
3cac35f736204d6faa234e05b69ae0dbd62c296d5fba6a27f8704d69e0c8d7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC1 5344 bytes
font_01_sfnt_off0000acd0.bin
8a820aa26a6592ad480dac8e7248a89c34b088461e748df308620cee4686f186		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD0 10700 bytes

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