Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b68fa42ffe8c3a…

MALICIOUS

PDF

32.7 KB Created: 2020-08-09 22:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54993640abe8e6e2019a54350c0d863d SHA-1: bf0af7c2cabd28ae09c512211b14097e547550dd SHA-256: a9b68fa42ffe8c3ae801a8f3cbeb5cbbac531078f406c747b4eb9caad9b7f88d
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and another identifying a redirector to a known malicious URL. The document body, though heavily obfuscated, contains the malicious URL. The primary intent appears to be directing users to malicious infrastructure through a link farm, likely for further exploitation or phishing.

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=alter+ego+frances+a2+pdf
    • http://files.michaelstiertherapy.com/uploads/1/3/2/8/132816096/gibojifajimi.pdf
    • http://jefiwi.larcofvaldosta.org/uploads/1/3/1/6/131637881/3f516a339d.pdf
    • http://files.benbodnarfilms.com/uploads/1/3/0/7/130738614/rikivenejovur.pdf
    • http://wojoto.bobbebold.com/uploads/1/3/0/9/130969465/pemabog-vovalaru-dabune.pdf
    • http://files.andrezsemini.com/uploads/1/3/1/4/131438490/zagin-zukaket-leragonirawab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/16002843352.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/cesare_beccaria_on_crime_and_punishment.pdf
    • https://cdn.shopify.com/s/files/1/0431/0535/3885/files/voxitidoxar.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/70154606077.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/35474523076.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/manujuwiwinod.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/koloxenuwulasazutejobuviv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7272/files/firuxesarufarejoxejekefo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/fotegowiji.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/16792766569.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/jifogazumajode.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_off0000441a.bin
00dafbd905d0434c0182c5022f3d803e7171114d684c28b7996a5eb3f8f82012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x441A 5444 bytes
font_01_sfnt_off000056b9.bin
cb6ba90dfaf2d40a8124740b726600dc7940cd82460d82e1d59090cef82aa22e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B9 9188 bytes

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