Malicious PDF — malware analysis report

Static analysis result for SHA-256 b259779bcd361342…

MALICIOUS

PDF

37.9 KB Created: 2020-08-12 14:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62e3ca4642bd66b827156540e063d587 SHA-1: f818f1fa6953030f734539c70471067e23d58687 SHA-256: b259779bcd361342010171506cc1649a01ef9603f9d82bf2b14b8c8ca5487fc8
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Walter cutting tools catalogue pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=walter+cutting+tools+catalogue+pdf
    • http://tovew.breizh-amerika.com/uploads/1/3/1/3/131380005/6959787.pdf
    • http://files.theothermanofsteel.com/uploads/1/3/1/6/131606408/a7e96e054.pdf
    • http://files.opalfund.org/uploads/1/3/0/8/130814288/1eac1b08.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/87871665891.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/4844415974.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/mepal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/husqvarna_automower_435x_awd_bedienungsanleitung.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/xutopebibufipivonek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/fizalofefedowusuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/on_my_way_bass.pdf
    • https://cdn.shopify.com/s/files/1/0448/3258/7936/files/typhoid_fever_cdc.pdf
    • https://cdn.shopify.com/s/files/1/0454/8503/1576/files/jarefiwiganinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/vegumipetoxoxizaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7555/files/dagotitopuwa.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_off00004abe.bin
b936161bb39cc66d66ea6df129c795b6cfcf52a8a43b49b7ad498b7a60e790b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABE 5220 bytes
font_01_sfnt_off00005c93.bin
c89b54565f0cfcff1f3eeccf74a2699cba591f7195aeaaf7f077d5c6c6c2deb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C93 9432 bytes
font_02_sfnt_off00007cd3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD3 4324 bytes

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