Malicious PDF — malware analysis report

Static analysis result for SHA-256 551460de49e5df16…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 04:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b7a6622d4a59ff41ecc0eaddc769f7 SHA-1: ea5682c5cbe6b28c0d9e4899e50735d0f9a9c1d9 SHA-256: 551460de49e5df16e4d3f6a9e53213dae5e9371e916b53069977e9c77f4f000d
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 link farm hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=free++antivirus+pc+without+internet+connection, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and a large list of other PDF links, suggesting a coordinated effort to drive traffic to potentially harmful 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.ru/pify?keyword=free++antivirus+pc+without+internet+connection
    • http://files.peggycoots.com/uploads/1/3/1/6/131606631/c62f53a17dc8cb.pdf
    • http://files.zygote.be/uploads/1/3/1/3/131384605/c9c06e58.pdf
    • http://files.zmagazine.co/uploads/1/3/1/6/131607010/zefimo.pdf
    • http://balubim.missiontrips.livingwatersspanish.com/uploads/1/3/1/6/131637047/8524411.pdf
    • http://lodaw.aramgershuni.com/uploads/1/3/1/0/131070450/4280097.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5082/files/kimenomawemusizegezi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2226/9090/files/25336679875.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/35958976526.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/vusijomibogaxarijezivodas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/13820233995.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/fovomarenajinenuluwaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/zonilosawimafedovosila.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/20762131588.pdf
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/29926616895.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/95911629527.pdf
    • https://cdn.shopify.com/s/files/1/0429/0294/5959/files/wefifagugub.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_off0000658d.bin
3bb5c1debfe560896caa60eefc8f5ae59327e7d4c369048b85f38a90d4b2955d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658D 5096 bytes
font_01_sfnt_off000076f3.bin
f6b6a5251bdcf3ce0b1bc7fe1f99d4f64cc11ecff771ed780d15c1efb172efba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10368 bytes

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