Malicious PDF — malware analysis report

Static analysis result for SHA-256 5197bb396782975c…

MALICIOUS

PDF

46.7 KB Created: 2020-08-03 04:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cd7164bafef981d195381965c8a1c21 SHA-1: 122ab3b68df7020bbf294674c3e335a1956ba3db SHA-256: 5197bb396782975c6306d9dcb0089ad1d93fd438b2d2dc5314b711fc6f4fb344
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to redirect users to a phishing page or download further malware. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a PDF SEO link farm. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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.com/pify?keyword=avast+stop+popups
    • http://files.krishnayogastudio.com/uploads/1/3/1/4/131406799/c778993e3cdce4.pdf
    • http://files.aspireimmigration.ca/uploads/1/3/1/0/131070394/bibedagagexedo_nodilaxife_befefaxaxube_bujeraf.pdf
    • http://files.isadorazhao.com/uploads/1/3/0/8/130813846/benanejadixotibi.pdf
    • http://files.scottowensdc.com/uploads/1/3/0/7/130740173/6550564.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/83783977223.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/the_last_naruto_the_movie_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/bizixebibadesaronajim.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/didopaxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7464/0286/files/jumelagusogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/jotolajilekeraguzezosojaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/58103070714.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1954/files/77623497685.pdf
    • https://cdn.shopify.com/s/files/1/0434/2149/9548/files/12549357054.pdf
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/dozifobeliwasimez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/jefomamanamisiligejux.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_off00007b15.bin
495dbbcbb45a6733dd4c376cb972e012e7734051c44470576d28d99fdbd5aa19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B15 4736 bytes
font_01_sfnt_off00008b4b.bin
c846f01a7f7a4189e17e45dc568794b86ab62737c44f22692626a4e0da3b3aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4B 10128 bytes

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