Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55cee3d7e76b1e7…

MALICIOUS

PDF

48.1 KB Created: 2020-07-31 22:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dcee564ee4d15de65c7f8e69cde6c3 SHA-1: cbe7bba6110900897e35a123cfc596ef166bea4e SHA-256: c55cee3d7e76b1e79eaf2b1e0a8d5e1aeb28332df141524d13e0f7beafd19018
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=read+csv+in+r', which is also listed as a malicious redirector. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=read+csv+in+r
    • http://files.thewarningfromgod.com/uploads/1/3/0/7/130775191/3068105.pdf
    • http://files.myenchantedlocket.com/uploads/1/3/1/4/131437119/16c22d153a62b5.pdf
    • http://files.santasacksbyreno.com/uploads/1/3/0/7/130775363/gidufokusobig.pdf
    • http://files.questionablyartificial.com/uploads/1/3/1/6/131607053/8335682.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/81660641114.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/national_healthcareer_association.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/85486843086.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/91149258747.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/segefoxur.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/neregisazifasogopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/sikelisov.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/tupuvusoxotabitobefidini.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/peranebuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/nilujejilorugejir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/dibedi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/44504677732.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/danakiwowufexipilujezakaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.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_off00007e93.bin
3527990266811d4d132697d3ee6857f87d0e721edc4db2380b5c37fb1ee491a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E93 4968 bytes
font_01_sfnt_off00008f92.bin
5c96ef1ada95ecaf2465d6e12186406856e16798f623712499d91161c0273cea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F92 10440 bytes