Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ca1a57a93bb68e…

MALICIOUS

PDF

39.2 KB Created: 2020-08-31 05:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c43a2958b08aacfedea64bce71f3a32 SHA-1: d81bde9c49c5939aece13ee50a2b45405a73dc95 SHA-256: 55ca1a57a93bb68ee9c0fe4d2cc1b92b57d50574516a1ff08fe2404c11b34da9
120 Risk Score

Malware Insights

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

The PDF file contains a prominent link to 'ttraff.com', identified as a malicious redirector. The document body, though partially corrupted, includes text related to 'cover mp3 free download', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The primary malicious IOC is the ttraff.com URL, which likely leads to further malicious content or phishing pages.

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/wix?keyword=cover+mp3+free+download
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/17155836987.pdf
    • https://cdn.shopify.com/s/files/1/0430/7825/4753/files/bowavofikevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1404/files/capteur_de_temprature_d_air_d_admission.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/87351201954.pdf
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/xapipevaludetokagikux.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_368b06d940954f8099999c122528968f.pdf
    • https://static.usrfiles.com/ugd/1c90dc_8e75084c76f3446bbafe3b6b0b06ca83.pdf
    • https://static.usrfiles.com/ugd/b8c837_bad49abe751b4e6fbf4d31c8e0ebd9e1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/71600134770.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/goxogonavoxupujolekapewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/remove_game_bar_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/belukarufunus.pdf
    • https://static.usrfiles.com/ugd/3de8a6_7b288e84b6234bda9f4c588a94d14a2f.pdf
    • https://static.usrfiles.com/ugd/7f16bd_dbb27534298b43679ae7f5ac2707ca81.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_off00005c23.bin
9ba11854f08a78af672aa0c1be3d6bb3468130f6e5376a0ee3b909925f619240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 5228 bytes
font_01_sfnt_off00006dee.bin
1001d10dcb2a4d49b63a7d33f5ab51a9606414944ed55b8c82d7dca3aaa52fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 10320 bytes

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