Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fc12a95c7327a3…

MALICIOUS

PDF

44.0 KB Created: 2020-08-04 00:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4266b3cc2c79338bae73010ee547c57b SHA-1: 5b4f6fb09bcbf3fbc08518c81e345164711cac67 SHA-256: 38fc12a95c7327a399e04032c085847dcc7d7b08dae1953355e4c0d7a5aaf645
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a job interview guide. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The primary malicious URL is designed to redirect the user to potentially harmful content.

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=job+interview+conversation+between+interviewer+and+interviewee+pdf
    • http://files.enzehan.com/uploads/1/3/0/7/130738553/7242537.pdf
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/6/131607029/9594697.pdf
    • http://memexixa.mypeakperformance.net/uploads/1/3/2/8/132814476/piwodepinavejiw.pdf
    • http://files.brookehancockdesigns.com/uploads/1/3/1/4/131453588/wofudake_jojuzolevaj_mulel_gavuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/36031615303.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3925/files/79600873464.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/bupijuguw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/veragixoxalanegenijagive.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/24637472987.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/72723541707.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/ribimugidukanevodeja.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/kagegoberafezurinilus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/16414209676.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0598/files/4002474809.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_off00006da7.bin
2d7d85fef1067c18798a552eb3b1624e0e9abd0f6c7e80c0c06b1cdd60a29a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 5400 bytes
font_01_sfnt_off00008021.bin
2cfcfd619b55108b028cf0d5f7cfd3ce6db42762d6a6e899c44de5717caa2a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8021 9900 bytes

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