Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed055b0b09e949fe…

MALICIOUS

PDF

33.2 KB Created: 2020-09-03 04:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a819adf4175a8e8a7659183bd479578 SHA-1: 5763a8cfb7ab1d4ea559efdc4274e3b353ce7f2e SHA-256: ed055b0b09e949fe77997ca8b8a89f001379d80cbe350da53b4861ec52eaa403
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.cc, which is disguised as a search result for song lyrics. This redirector likely leads to a malicious payload. The PDF also contains a large number of links to other PDFs hosted on Shopify, which is a common tactic for SEO poisoning to increase the visibility of malicious content. The ML classifier strongly indicates maliciousness.

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/wix?keyword=chennai+gana+songs++kuttyweb
    • https://cdn.shopify.com/s/files/1/0432/2276/1635/files/62045715674.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/45530604270.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/bumekusubasarigo.pdf
    • https://static.usrfiles.com/ugd/804ff6_1e4e66b6744947519e7fae8ecbce8798.pdf
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/portal_office_free.pdf
    • https://cdn.shopify.com/s/files/1/0462/5206/4917/files/19294447055.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4731/files/44005144975.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/cutnell_physics.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/simikeselaxalufamubezowex.pdf
    • https://cdn.shopify.com/s/files/1/0431/9087/8372/files/benefits_of_soil_organic_matter.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/16376073857.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1008/files/calendario_rusia_2020_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/amilcar_cabral_political_thought.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_off000042c1.bin
7af1d69ea4bfb13205b41c493b4a825504a4565e2b94812d285cd270e479231e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C1 5120 bytes
font_01_sfnt_off00005447.bin
34a71f1f3ad0d9a70f3e702ce711c45c0a380cc1c9bdd307c052112530f7d973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5447 10116 bytes

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