Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12a3398a1b916a6…

MALICIOUS

PDF

44.2 KB Created: 2020-08-04 16:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75ceb4f22336563419e389b5b48ef210 SHA-1: 609d051f98b96f74f88b4e61dc83a33b3312a675 SHA-256: a12a3398a1b916a6b99c22b2c5c19f0c3f27859847f1b21597e8af47615e300e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=probability+color+by+number+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, containing numerous external links, many of which point to Shopify domains hosting other PDFs. The document body itself is heavily obfuscated but contains the same redirector URL. No scripts were extracted from this sample.

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=probability+color+by+number+pdf
    • http://files.mainehunterjumper.com/uploads/1/3/0/7/130738801/ee6bf2dcb.pdf
    • http://files.thehighanxietyrunner.com/uploads/1/3/0/8/130814529/5341b0ba.pdf
    • http://files.guesshowmuchiloveyoujewellery.com/uploads/1/3/1/4/131453062/3004337.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/vusetinuwomewabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/88171817217.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/secret_skype_emoticons_2016.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/74939982120.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/98755957054.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/pififibafomaxagelag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/rubuvofejudalavevigoxopuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/wesubawosenob.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/jifomujotowufetariki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/81435479024.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005818.bin
ffca674665092746ecf0f1e68674b2388cdcac1567cdbd9d35f8e2ff3a51f0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5818 5368 bytes
font_01_sfnt_off00006a48.bin
3d7a0ac132e3dc8faafc02fcd3fec6e00d1acffd876d67d398229a7f0966aa91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A48 10544 bytes
font_02_sfnt_off00008e90.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E90 16144 bytes

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