Malicious PDF — malware analysis report

Static analysis result for SHA-256 2455e2b352cc7b88…

MALICIOUS

PDF

36.2 KB Created: 2020-08-17 17:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d6a2491d90a87470a3d59bd1742e18 SHA-1: b5186477f188ff2f4bd5c131ded5db9b2c5cb067 SHA-256: 2455e2b352cc7b8840a8fbb5e769c34826cc1d5400218b264f65d8cdd79bf45a
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an APC UPS service manual. This redirector likely leads to a further malicious payload. The PDF also contains a link farm pointing to numerous other PDFs hosted on Shopify, some of which are benign, but the primary malicious link is clear. The ML classifier strongly supports the malicious nature of this document.

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=apc+ups+1000va+service+manual
    • http://tanidodaw.mckenziebible.com/uploads/1/3/0/7/130739553/2570431.pdf
    • http://files.onceuponabus.com/uploads/1/3/0/7/130739385/4202839.pdf
    • http://rukopovu.davideagle.ca/uploads/1/3/2/6/132680949/99c7e.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/45179893748.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/vudifemuzidoxaxup.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/scratch_source_code.pdf
    • https://cdn.shopify.com/s/files/1/0455/3677/2261/files/17646227722.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/cidco_lottery_2020_advertisement_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0006/0310/files/vigapefokaxowowabaxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/mesisiwebakululifedovaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/boxex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/zetakipidatirexok.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/binaboki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/gaming_pc_build_guide.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_off00004d5d.bin
5be62f00ce307411c8338d8f3926086042d2a94cadd60de68bde00dd31a3a233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5D 5324 bytes
font_01_sfnt_off00005f64.bin
f0e2a7a5921d19d14dd129b79d451120e735da2f72333d372a0aea0526ff6252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 10236 bytes

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