Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb91ea58b5dfc20e…

MALICIOUS

PDF

47.9 KB Created: 2020-09-01 05:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71ed654b2cc5d7faf07bdc45b0b7058a SHA-1: 3cb71fb5b97ae5a7bdb4ce142af62c558dadf55c SHA-256: eb91ea58b5dfc20ec83d2bb7bd141bd35c36f89c964f7d31f1bfa62e9f3d3144
120 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a search result for "Bittorrent client free for windows 7". This link, https://ttraff.me/wix?keyword=bittorrent+client++free+for+windows+7, leads to a known malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or to distribute malicious content. 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.me/wix?keyword=bittorrent+client++free+for+windows+7
    • https://cdn.shopify.com/s/files/1/0429/2627/6771/files/fijipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/66125164265.pdf
    • https://static.usrfiles.com/ugd/2ac701_63a527d95336457eb39712bdc6d9dd7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_29d15258593e44d387c7d55473aceaf8.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/92640138125.pdf
    • https://cdn.shopify.com/s/files/1/0428/1001/5910/files/zaloz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/7391220836.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/jerijozoporaxupotate.pdf
    • https://static.usrfiles.com/ugd/65b209_e3c57c0fbc9b46afb93bd633b7754e2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1665510cc943a4abd4f90de84a8551.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_off00007dbe.bin
763d6361acb7ddb344c2acec45104a3010d000e78a6994707cbbc898a510d022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBE 5028 bytes
font_01_sfnt_off00008f07.bin
8e7eff1c53bd3841674b81070ecf4e3c35a936eadc468f34fee2480c83f44312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F07 10412 bytes

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