Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa9154320006649…

MALICIOUS

PDF

54.4 KB Created: 2020-08-24 05:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e065322d8a9df2ad34664c6f9d7ec93 SHA-1: c9e36b5a404503df54229e9b15e992b8b8c1f2b0 SHA-256: cfa915432000664963cd416816b3b5ad039c3be7904d2b7bd168b5e18204ec2f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=raw+diet+feeding+guide+dogs'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious sites. The presence of numerous links, including those to Shopify domains, indicates a link farm or SEO poisoning tactic to distribute malicious content.

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=raw+diet+feeding+guide+dogs
    • http://files.martismemories.com/uploads/1/3/1/8/131857115/xuvupusaburefukab.pdf
    • http://files.ebpnj.com/uploads/1/3/0/7/130740375/7137304.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/attendance_register_format_with_time.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/codashop_pro_ff_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/laken.pdf
    • https://cdn.shopify.com/s/files/1/0431/9100/9442/files/49173888647.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/android_sdk_28_gradle_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/3979372757.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/s_letter_romantic_status_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9845/files/banking_awareness_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/muxamik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2589/files/rajuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/42962609852.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/67611041471.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_off0000982f.bin
70a6be2fe9d530df32201ff7ce901127a1314822fb77dfdc00d63da6796b6ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 5048 bytes
font_01_sfnt_off0000a989.bin
0ced4ea044993b0bf6e9a33c9206d64cbda529af0bca8a17dc77fde5895a682e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA989 10352 bytes

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