Malicious PDF — malware analysis report

Static analysis result for SHA-256 40768835c5ac4d74…

MALICIOUS

PDF

37.3 KB Created: 2020-08-27 21:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b5de0db6b35fbe9778fefcb7809bc2b SHA-1: 77d23a00e55d22281328e1294b0f7712da46d70f SHA-256: 40768835c5ac4d745056f18c90832543c03e4f8b40449f0b14d824eba049d99e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraffic.com, which is designed to redirect users to further malicious sites. Additionally, the PDF hosts a large number of external links, many of which are to Shopify domains, suggesting a link farm or SEO abuse tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through a link that ultimately leads to malicious infrastructure.

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.com/pify?keyword=tivo+live+guide
    • http://files.alenaephotography.com/uploads/1/3/0/9/130969761/zuluwajuzoziluraj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/sugepikanukapoxunew.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7284/files/12231617065.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/46058814366.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/murogiforuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/viwogoreg.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/sabowumiluwibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/xcode_could_not_locate_device_support_files.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/kiwemenuvoroxaxulezefil.pdf
    • https://cdn.shopify.com/s/files/1/0435/0941/6095/files/peer_assessment_rubric.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/xogurazijawajoriloloxiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/84441491802.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_off0000579c.bin
d53fe579847597ad98d18ed2cc2a203f3434061fa0ea51650cc9cd559eac02bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x579C 4520 bytes
font_01_sfnt_off00006716.bin
ad18ebc671ff7d153a270bc2f749831277a4c2d2a0d24a3d5202bbe1301481e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 10004 bytes

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