Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b877ef61ce3c6f…

MALICIOUS

PDF

106.1 KB Created: 2020-08-12 06:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 951caf5a217d42aecb23fcff62199dba SHA-1: 37022562501aa9970a13d62ca759d1cfbcae686f SHA-256: c1b877ef61ce3c6f7747cd38c31fac1199ce0406ae708bb4fe583af242ba83f3
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=las+benzodiazepinas+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring users to malicious infrastructure via deceptive links within the PDF.

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.com/pify?keyword=las+benzodiazepinas+pdf
    • http://files.zeloan.net/uploads/1/3/1/8/131856318/bf6651d0293.pdf
    • http://gagesu.faith-nexus.net/uploads/1/3/0/8/130814328/8f754d649fe28.pdf
    • http://xavaba.gardenofchange.org/uploads/1/3/1/4/131482976/besowopeboji.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/elasticsearch_delete_index.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/badinerie_flute_bach.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/10540896726.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/42471346243.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/patorex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2313/files/19185133057.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/fojiverutofelugeguniv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/16515466215.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/zigemetada.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/91200601340.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/93720977352.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/digudidoladesa.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_off000152ad.bin
ad68bc6aa0a2904a5989798033f80b71bf549bbcb83f9cc1616a1f9baddf67a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152AD 5036 bytes
font_01_sfnt_off000163ea.bin
ff3a1630bd2b495b3a59bdd0b9835df56a0e8fa7221cabd18a42ce0af1163ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163EA 17984 bytes

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