Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b4d25866834474…

MALICIOUS

PDF

69.1 KB Created: 2020-08-14 22:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3fec910f7ac2067f69db73147d5d99 SHA-1: 3c5b3b4d299aea93ee0afb5e503a848eb9a58d2b SHA-256: b4b4d25866834474b5b70ebd2806d7748f47828c69a969056a9835a8995e8368
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a link that redirects to malicious infrastructure, disguised as an 'army comsec incident report'. This is further supported by a heuristic indicating a callback phishing lure, suggesting the user is prompted to call a number or click a link in a deceptive context. The document body, though heavily obfuscated, contains the malicious URL. The presence of multiple PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=army+comsec+incident+report
    • http://nigugad.mikeforu.com/uploads/1/3/1/3/131384618/zezoxivukomod_fexubowufufife.pdf
    • http://files.gunsitters.com/uploads/1/3/0/8/130815014/5d4293a.pdf
    • http://files.jodikostalastrology.com/uploads/1/3/0/7/130776168/6cdb659ecdf06e.pdf
    • http://rijumi.artisaninc.com/uploads/1/3/2/7/132740718/tesipomedum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/77252278809.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/47402120306.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9076/files/pudomaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/15493110958.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/64572977721.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/41030367098.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/edital_concurso_prf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/78627053420.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/5266732395.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_off0000d38a.bin
dfa83d9dda29f88244ca9201ff74b06639d6a248208378bd97fc3d3f066f8aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD38A 5068 bytes
font_01_sfnt_off0000e4b0.bin
61fa9a521703b0ad5847bb67110bb5534d3ab28b06d7fa2f10c162a97ec56e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10288 bytes

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