Malicious PDF — malware analysis report

Static analysis result for SHA-256 2164a571351cc252…

MALICIOUS

PDF

36.2 KB Created: 2020-08-17 04:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aadb10b3a923b9277e948285685de43 SHA-1: e20f87cd2771dfb29ceb70c63b3a9eaad8bcfca6 SHA-256: 2164a571351cc25277b423279cb81b805529fd7c37ab977c4b0e264a8e243e2a
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as a search result for 'Aristotle nicomachean ethics hackett pdf'. This suggests a phishing or scam attempt. The file also contains a large number of links to Shopify-hosted PDFs, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=aristotle+nicomachean+ethics+hackett+pdf
    • http://xituli.rachelannkaplan.com/uploads/1/3/0/7/130738902/gedomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/akai_pro_software_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/67158423244.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/84381917373.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/best_email_newsletter_templates_2018.pdf
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/80718882879.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/11092408122.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/ultrasound-_guided_subcostal_transversus_abdominis_plane_block.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nujininekepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/gikasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/44511213843.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_off000043eb.bin
9c4448004ef28f890f825ea5ca294acd39e6f81298e3a5fd70a344f570b12f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43EB 5236 bytes
font_01_sfnt_off0000557e.bin
d55d8056186c833efeb5582d0237c7b9891483f47d2b0c6b7e824fe1da9bbe0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x557E 9488 bytes
font_02_sfnt_off000075ec.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EC 4324 bytes

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