Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ae23167f486d21…

MALICIOUS

PDF

46.9 KB Created: 2020-09-02 16:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf2b8d380dddbcbac0b929d1c3a2f51 SHA-1: e10cfc45508c45f7c7ff9243134122774d7ea11d SHA-256: 36ae23167f486d21cda80e403f0b62e92ab67b477a5e9c9f86b7d09c61970854
150 Risk Score

Malware Insights

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

This PDF file contains a mass external link farm, with multiple links pointing to Shopify-hosted PDFs. One prominent link, 'https://ttraff.com/wix?keyword=terraria+cultist+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=terraria+cultist+guide
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/ratezilexoxiwiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/9478/5704/files/31854603814.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/nipus.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/14768021312.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/maplestory_chaos_zakum.pdf
    • https://cdn.shopify.com/s/files/1/0447/8061/7885/files/30903796552.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/john_deere_216.pdf
    • https://cdn.shopify.com/s/files/1/0462/2725/9541/files/84208682073.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/jizupifotuguvuxipito.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/kuxinodijam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/87877633188.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/4566167992.pdf
    • https://cdn.shopify.com/s/files/1/0436/9406/3770/files/lelamajidovizefu.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_off00007674.bin
211da4fd85d10827bf8bc35dc62fdeb678c5de919433710769708f12a0a31576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7674 5056 bytes
font_01_sfnt_off000087ab.bin
22094bd9b358eb02cee0adfc8056ac1ca80bee72d80ce855952060df20544ba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AB 11496 bytes

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