Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc78082b26891aa…

MALICIOUS

PDF

50.3 KB Created: 2020-08-01 00:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ff44a901b1c5bac9329bbb25fde1244 SHA-1: a32cc65207e85845037e12731ca0704b40c673a2 SHA-256: 3fc78082b26891aa62da072d6abc909466bd4be6d0a491cf33e0e82c6c381416
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of external links. One critical heuristic firing indicates a PDF redirector link to 'https://ttraff.ru/pify?keyword=1-+page+meta', suggesting a malicious redirection attempt. Another critical firing highlights a PDF SEO link farm, with 'https://cdn.shopify.com/s/files/1/0433/8394/7427/files/saruzoka.pdf' being one of the many embedded links. The document body contains garbled text along with these URLs, reinforcing the idea that the document's primary purpose is to host these links.

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=1-+page+meta
    • http://files.carlyle-consulting.us/uploads/1/3/0/7/130740026/1031746.pdf
    • http://files.fastblueprints.com/uploads/1/3/0/9/130969489/tokuvel-putegoxa-wutinovuzazazaw.pdf
    • http://files.ikkarpublishing.com/uploads/1/3/0/7/130738970/1667986.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/saruzoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/98393636846.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/vibotelazeto.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/39368989119.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/nusoxawikokupoloxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/91162048105.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/6423028096.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/letopetudusexuve.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/xegoditavazakifivinib.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_off00007ba1.bin
c5a5c35588519a83cdd5900b32500f521c707d30316594c758e92c27bc9d87b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA1 4348 bytes
font_01_sfnt_off00008a6c.bin
fe4c4d4792e8f4e0b0c6bb98673a18e3c579fae694539a30d40e9dc7da2d85e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6C 10708 bytes
font_02_sfnt_off0000aeca.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAECA 4324 bytes

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