Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf679b0f69eb8a9d…

MALICIOUS

PDF

42.2 KB Created: 2020-07-31 21:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 548694f9b29114abcf58a7360f53f38a SHA-1: cbdf8dc1055f048a77c5385f779abe45a4fe42e5 SHA-256: cf679b0f69eb8a9de10b35a1a26ab51d629b830608ece53b74c121e93ae2a160
120 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document also contains a large number of links to other PDFs hosted on Shopify, forming a link farm, likely for SEO manipulation to improve the ranking of the malicious redirector. 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.ru/pify?keyword=arduino+clear+serial+monitor
    • http://files.swedishamericana.org/uploads/1/3/1/3/131379183/ac3a302fbcab59c.pdf
    • http://files.harmonyorganics.net/uploads/1/3/1/8/131856276/acadee41a.pdf
    • http://files.hunterandersonrichmond.com/uploads/1/3/2/8/132816036/1027661.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/856247954.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/21560409522.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/worasume.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/17797240294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42778981568.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/barufatifenilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/dalewarozivotigakumib.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/9238198408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/joteterexafezurixurafuwun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de7.bin
859494af90ed40dd156f904f5386888518ea552f3f5cd152b81339787acc6d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE7 1700 bytes
font_01_sfnt_off00006616.bin
bd4d0e296412625a460087852c85adb50c41225e030f262f8600646cb92e00a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6616 5072 bytes
font_02_sfnt_off0000773f.bin
21a21db2820f92294a0ad8acad8459c579fe38b2e8f9d3051f8d1530b9ec8925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 10772 bytes

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