Malicious PDF — malware analysis report

Static analysis result for SHA-256 4694641ab5dc92b4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 12:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f87c6324e6b580d65d21ba7cca3003d SHA-1: 5e2577a6d2bf6d4bff9fe61ce56266e91fd6c983 SHA-256: 4694641ab5dc92b4d3f9683c24066fb23e4f6f9cac733fee72112db3614204bd
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of a link farm suggests an attempt to game search engine results to lure unsuspecting users. No scripts were extracted from this sample.

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=ordering+rational+numbers+on+a+number+line+pdf
    • http://files.asthecrowfliesquiltshop.com/uploads/1/3/0/7/130738771/xamalik.pdf
    • http://muxipuput.acceptlease.com/uploads/1/3/1/1/131163898/f4e963688.pdf
    • http://files.bidwellwildliferehab.org/uploads/1/3/1/3/131379510/doxiko.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/pubifelegoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/pdf_ac_dressing_ampoule_mask.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/nekanapebepujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2304/8609/files/93611971940.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/xusuwulixupofekif.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/tagesodutajexasejolar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/sapuko.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/woredezemikapipefadavew.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/56621141691.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/motadovilevifirojek.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_off00005deb.bin
0913f6257a8a871dde042c107e73e66ab2fc0552649388199b51242f87f95122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEB 5408 bytes
font_01_sfnt_off0000702d.bin
2bdcc58dde845679d82e188e75e92e6cc4b606ef70cf4384a00b2ea513c1b910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 9896 bytes
font_02_sfnt_off00009220.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9220 4324 bytes

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