Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a8227564781869…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 00:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad35ca36e8e75e37db26b598d3c82c24 SHA-1: 2b39dd22b7776e94b30d989851a8849880f1ee51 SHA-256: 48a8227564781869ac5047c43a440fbacdb30e1746368a3ac874d094627a96fa
150 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=dell+brocade+6510+firmware`. This link is likely intended to lure the user into downloading a malicious payload, disguised as firmware information. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify domains, suggesting an attempt to obscure the malicious redirector among seemingly benign content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=dell+brocade+6510+firmware
    • http://lokezi.friendsofraymondjames.org/uploads/1/3/0/7/130775940/6999751.pdf
    • http://files.markcharlesdavis.com/uploads/1/3/1/1/131164476/kumejavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/81877614313.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/lol_morgana_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/non_conformance_report_form_iso_9001.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/74817602229.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/68811773240.pdf
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/romopegumirenurepomowom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/jijovejezidix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/dojov.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/cabala_egipcia.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/taralifavevidebozoriladu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/82927648311.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_off000058c7.bin
2273842afa50c06371b595a00903e6f976219a841f2253c0515ea3c25906e01f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 5692 bytes
font_01_sfnt_off00006c25.bin
1d779fd548282468daa2ac2273d473f3a7f6685864976eb54581a8b9d2454c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C25 10296 bytes

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