Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc2beac6a01f6bf…

MALICIOUS

PDF

58.2 KB Created: 2020-07-30 05:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00682fcb27f60e7f2b4c5a018be33910 SHA-1: 78ea2779a883593a0b07c1be87da557a2fad9e4e SHA-256: 3dc2beac6a01f6bf2ec35568966077e22635d308d1e327da257bf1b98a88b500
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=cell+membrane+of+bacteria+pdf', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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=cell+membrane+of+bacteria+pdf
    • http://files.goldendaleobservatory.com/uploads/1/3/1/3/131398540/20bfe475a329fb.pdf
    • http://files.hivhope.net/uploads/1/3/1/4/131453406/834b0d1a77ae.pdf
    • http://files.allthingsdunham.com/uploads/1/3/0/7/130739510/5015553.pdf
    • http://files.eternalimpactmissions.org/uploads/1/3/1/0/131070207/d4ca2.pdf
    • http://files.laneinspections.com/uploads/1/3/0/7/130776592/1315519.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/xikivadejuxaxuxaxemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3680/2204/files/poxupomive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/labadunogite.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/3518172017.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/nirudinatego.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/20995523482.pdf
    • https://cdn.shopify.com/s/files/1/0435/7121/6542/files/datilekatojunekuwilosefum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/zivobudopotajuxiwixujavu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/nisuwejesujavekizejelela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.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_off0000a548.bin
3b0406b004715451090de9017fa2cc12635772061c46a81324749b9a0555e109		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA548 5072 bytes
font_01_sfnt_off0000b663.bin
ff80095a6af9b6b2247556380103009fd66455a04017902a0012aeb6345e66c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB663 10412 bytes

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