Malicious PDF — malware analysis report

Static analysis result for SHA-256 191559551aa2e49c…

MALICIOUS

PDF

52.4 KB Created: 2020-08-31 04:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7377044e37184631104ae6f25b360a6d SHA-1: d0dc81d6ea836c58f7172e9b665e3b6b6ddd65ac SHA-256: 191559551aa2e49cea66b0b4ef3587e0e4f0d6ba08eb36b1dad37d9b957941d0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to contain text related to 'Stihl ms170 spare parts list' and includes the same malicious URL. This suggests the document is designed to trick users into clicking the link under the guise of finding parts information, leading them to a malicious site.

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=stihl+ms170+spare+parts+list
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/58161017669.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/zitajatiwupuxuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/rodawepemamutimivitet.pdf
    • https://static.usrfiles.com/ugd/afe78f_be23659dbba346659064355f7ecdb9be.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/baccalaurat_en_informatique_uottawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/zasedam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/31517404629.pdf
    • https://cdn.shopify.com/s/files/1/0435/3828/4696/files/21094006254.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/gugalolapetotojuwobalejuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/wamovesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/journal_of_family_business_strategy.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_off00008718.bin
656681a782ce48718c250246449dbc08b01ef1afcf75543b6d2ff788ab0e4c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8718 5436 bytes
font_01_sfnt_off0000996e.bin
a4a834d6e5ebac502a7455687068def1d913716723ca0635abb15943244259e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996E 14020 bytes

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