Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cbfbef85ccc3b1…

MALICIOUS

PDF

47.2 KB Created: 2020-08-26 02:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec73ac58ccd093cd7f55a6d7efd2ecb SHA-1: 17dd01b3a979b6d00c6abe8d7a58650b57844af1 SHA-256: c3cbfbef85ccc3b115daa6b02b351db6cda93e47481225c4fe61ad0de76b1129
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=aboriginal+art+symbols+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting the file's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm heuristic further indicates a malicious intent to distribute links, likely for phishing or malware delivery.

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=aboriginal+art+symbols+pdf
    • http://pewuxovo.aristoclad.com/uploads/1/3/0/7/130739173/dotepok-wewerilonigapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/7th_grade_math_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/kuloparinara.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/madalisadonowurikilotulaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/23279704645.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3798/files/chord_progressions_piano_minor.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/27485951710.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/jabakobakubexusoxirudeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/najefivejuwuraketer.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7668/files/bsc_nursing_college_in_west_bengal.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_off00007d6e.bin
0ccb0a331847f77e9d7d38accdae9d6ed4cfe225053285aeed5b416a40ab05f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 5592 bytes
font_01_sfnt_off00009056.bin
ee5a5eee3a54b2c2887d52b636cfa22ea30c3c46f9092d4cce50ac816c057f87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9056 9328 bytes

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