Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57c74ca436ba738…

MALICIOUS

PDF

32.4 KB Created: 2020-08-12 22:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b02e2d3259d25e0794d3bab50a6d619 SHA-1: e66380f015dd89161cfc7c9e4a4775648c46a9c4 SHA-256: d57c74ca436ba738c0d75dfd3e13fcc6216c634e2e763797ae5a433625a52419
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a financial form. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The presence of the malicious redirector suggests an attempt to deliver a secondary payload or phish for credentials. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/pify?keyword=birla+sun+life+mutual+fund+stp+form+pdf
    • http://files.buffconsultingclub.com/uploads/1/3/2/6/132681916/tonekekamobud_nezijeza.pdf
    • http://files.buildteacherhub.org/uploads/1/3/1/4/131406505/8552289.pdf
    • http://files.artinktown.com/uploads/1/3/1/4/131438419/0ec663bb67.pdf
    • http://vetabof.zuyu66.com/uploads/1/3/1/4/131407089/xajubixinozebazaruna.pdf
    • http://files.photosbyjoierey.com/uploads/1/3/0/7/130776821/5261103.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/25954139374.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7348/files/mapomowet.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/58883459856.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/kenmore_washer_repair.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/kixulesare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/sleigh_ride_trumpet_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/how_to_increase_discord_volume.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/xunixijagiwitejulajozaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/92255474061.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/20410828152.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/bulisatejid.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_off00004185.bin
f121f21a4cbd29ac77ed5469ae4a95bf4529a4b9758fffdff9ddfb880adda9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4185 5236 bytes
font_01_sfnt_off00005338.bin
892dd0ce48800c64e9fe78e735d28cf7a6c02cb370cb998bdd1bcb119712b034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5338 10360 bytes

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