Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da2b02e0098e509…

MALICIOUS

PDF

37.0 KB Created: 2020-08-07 02:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bc524edb0dd212f52484b0c92abc1cb SHA-1: 5b808101875bce851482b9397a8a8c1fac952c93 SHA-256: 1da2b02e0098e5099d0660a6b2dd0ca37688e1492d46c1ce9985c8734f6a35d3
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ammo+45+certificate+pdf'. The document body, though heavily obfuscated, contains references to 'Ammo 45 certificate pdf', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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.cc/pify?keyword=ammo+45+certificate+pdf
    • http://piboz.peakelectricbikes.com/uploads/1/3/1/3/131398091/megaxipexupiluba.pdf
    • http://files.satellitecityhall.com/uploads/1/3/1/3/131381607/d57e0fcb8b9.pdf
    • http://xitumag.rtgdanceministry.com/uploads/1/3/1/3/131381428/pelarek.pdf
    • http://nipajaf.carenharrisphotography.com/uploads/1/3/0/9/130969465/pefozede.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/puninudezebogigoruw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/js_array_push.pdf
    • https://cdn.shopify.com/s/files/1/0437/4842/5889/files/87581757764.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/kanipej.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/ziwamofopo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/adquation_formation_emploi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/96029518618.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/gawepafikobenadifimabo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6374/5441/files/aumenta_tus_gluteos_sin_cirugia.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_off00005141.bin
829e67ca0b9683fd006066c7e37e5826bcac57eaed0bac62ff3d3be3a089ae10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5141 5292 bytes
font_01_sfnt_off00006339.bin
6a7a0efe4efbd54958304c1e14f2e9c14b10e097f197cd519c08f4863af31945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 10668 bytes

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