Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5ad33e32aaeff1…

MALICIOUS

PDF

45.3 KB Created: 2020-08-18 22:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b524a3f4de5e4889c958ce9a63da70ce SHA-1: 4809a23592e46e7427ab148034c0da9d09218d78 SHA-256: cb5ad33e32aaeff10cb6f0e22574ac0b71d2074329fe1a143616d4fefab653ad
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body and embedded links suggest a lure related to software or product information, likely intended to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious 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=vsco+x+latest+version
    • http://files.girlranawayshop.com/uploads/1/3/1/8/131872273/kizawoniwam-lifalekelolur-kudaxipazovu-bidudalofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/99004320227.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/86112714167.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/how_to_renew_adobe_trial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/23990531836.pdf
    • https://cdn.shopify.com/s/files/1/0437/3531/8689/files/fuzozixopugoxazamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/loleburejibotofodero.pdf
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/83569682782.pdf
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/98230343236.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/we_beat_the_streets.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_off0000740a.bin
91050ca5fd6323bd71a06a2cdaa590b0978aa7154abb1222acc764692d955809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740A 4884 bytes
font_01_sfnt_off000084c2.bin
48d93ff8894f58e1875983def4c24e29a2cedaa272f99b84d3a551c7eea90e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 10664 bytes

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