Malicious PDF — malware analysis report

Static analysis result for SHA-256 31158ac07fd9a403…

MALICIOUS

PDF

64.1 KB Created: 2020-08-28 01:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a46f7c9ae5539649674df1c2b5e24dd SHA-1: cd2ef9a9714a38c996901bbd1ebd105f99cba20c SHA-256: 31158ac07fd9a4035bbf31d06dbd35750d2ff1f114badaf4e47fd52e7dc22988
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=list+of+minor+piano+chords', is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'List of minor piano chords', likely to disguise the malicious intent of redirecting users to harmful sites. 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=list+of+minor+piano+chords
    • http://files.tankingsresources.net/uploads/1/3/1/4/131454345/b7608a9384b34b.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/wexofinufivodetit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/cancionero_infantil_para_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/67408206586.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/32563355044.pdf
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/17315651032.pdf
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/kafelalipafomowufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/13647168182.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fexofedome.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/68095400390.pdf
    • https://cdn.shopify.com/s/files/1/0463/4755/0882/files/grandfather_clock_howard_miller_manual.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_off00009f08.bin
a4086e7fafa723492cd28d02d13e198daeddda3137488a9ff5919595fce4a07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F08 5304 bytes
font_01_sfnt_off0000b0d9.bin
29b68397ef02fe6f6b0d072cf595e0f4602b0a85d6b0653498c83c2f63ab0f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D9 14812 bytes
font_02_sfnt_off0000de73.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 16120 bytes

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