Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f930d0fa768a98c…

MALICIOUS

PDF

42.5 KB Created: 2020-07-31 19:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b670c15e75f52fc76970655d616755 SHA-1: 679aba92e87c87fc395195db4ee88ca67e65a543 SHA-256: 3f930d0fa768a98c3f43880de9eeb9cfb99fe6a2d3b3e364e9082eff026b32cb
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to external PDF documents hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a lure or initial stage for further malicious activity. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents.

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.cc/pify?keyword=r4+card+for+ds
    • http://files.southlyoneastboysbasketball.com/uploads/1/3/1/4/131407439/vonazinuvod.pdf
    • http://files.brightchildcdc.com/uploads/1/3/0/8/130874090/a1f9adc02c.pdf
    • http://files.redvalleyfarm.com/uploads/1/3/0/8/130873769/ef53c7.pdf
    • http://files.counsellingforliverpool.com/uploads/1/3/1/3/131384559/1a6dead3fb09e.pdf
    • http://files.myprivatefanclub.com/uploads/1/3/1/4/131437464/bd43a.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/darogijiwosugatovajelego.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/tigepamake.pdf
    • https://cdn.shopify.com/s/files/1/0429/3672/9766/files/61580289649.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/29770860320.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/25852327385.pdf
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/rodaviza.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/42143067190.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/kejimanulikarimesefukej.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/gegobasudom.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_off00006a41.bin
f19fb8e5644fee3850a567724c9d6ef01206d12a359f2094d969cdeb54ddbe60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A41 5076 bytes
font_01_sfnt_off00007b9e.bin
b1ead2781188a4e1647730ad24af0e23dee0b9c6b7e260b665428d4d0487df31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9E 9924 bytes

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