Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3ae912b8fdd351…

MALICIOUS

PDF

51.2 KB Created: 2020-07-30 08:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c5ce34f7d107cc4feb88a4f7c921d33 SHA-1: 0d5ecf7c9ae68d74e73be2a63255debbb6172fa1 SHA-256: 8c3ae912b8fdd35126efd3ccaaa3f2a60a27f5c517905c65f2368524a3864354
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, contains text related to 'Armour of god bible study pdf', suggesting a lure to disguise the malicious intent. The primary 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=armour+of+god+bible+study+pdf
    • http://files.heartpieces.net/uploads/1/3/1/3/131379749/3776242.pdf
    • http://files.stefanschwarzkopf.com/uploads/1/3/1/8/131856954/sixek.pdf
    • http://files.stpetersmountainlakes.org/uploads/1/3/0/7/130775306/binuweraxupafavev.pdf
    • http://files.southwestdistrictcoinclub.com/uploads/1/3/1/4/131438234/rilenezerasaf_zasiroluga_wufoxusuwukoxik_vuvitixikoziles.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/2820990077.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/5358227092.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/fagidudumosetunudesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/77536709763.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/15536000068.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/pozijavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/27292158919.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/fusupedobub.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/falaz.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_off00008b89.bin
c7d9d995a432d133258d99d88104b9a722992cdd497fbe522b92760c19a96311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B89 5160 bytes
font_01_sfnt_off00009d23.bin
80dc0c3e15f4cd80834c934bebdfdfb24b26f4c26404192762b1929856b2514a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D23 9964 bytes

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