Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ef149d1d3fa24f…

MALICIOUS

PDF

54.4 KB Created: 2020-08-05 06:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48534bfb094b020228412fa135934ece SHA-1: 10957ab73f49f2a7015fe914c4ac2419c81eee77 SHA-256: 24ef149d1d3fa24f436813f16ca1190001172db822bb0d621b6e173445237c10
120 Risk Score

Malware Insights

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

The PDF file contains a mass external PDF link farm, with 24 links pointing to various domains, including a known malicious redirector at ttraff.cc. This indicates a likely attempt to distribute malicious content or conduct phishing by leveraging a large number of seemingly benign PDF documents. The primary malicious IOC is the redirector URL.

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=aluminothermic+process+pdf
    • http://files.shahrilfaisal.com/uploads/1/3/1/4/131408581/32ebf8ae15.pdf
    • http://files.simplysweetshopnola.com/uploads/1/3/1/8/131859261/lelapaledesatib.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/kivonilabulidabisufuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/savekano.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8642/files/87317852873.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/28060457784.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/zobogufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6307/4213/files/takirazalowesog.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/vasudevan_biochemistry_for_dental_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/51215874943.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/toefl_test_papers.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_off00009207.bin
284799e11606c3c00671e01527c6db1c8876532ab4115e782e87be3f895b64ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9207 5172 bytes
font_01_sfnt_off0000a377.bin
4dc3559b3463fb9ab596ead0df47749a7379fd3246b6b66b59e5728cdc634ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA377 13340 bytes

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