Malicious PDF — malware analysis report

Static analysis result for SHA-256 006da9c63016778b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 09:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b2a29ff3753c263935ddf54c73ab25 SHA-1: d5df13b62e4c0679bb7197c6d3daf22a03d80d58 SHA-256: 006da9c63016778b7f543dca778f4cf8bf0e621aa45e861eba9ff1e591d31241
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded links, masquerading as a free calligraphy PDF, which is a common lure for SEO link farm schemes. One of the primary links, https://ttraff.cc/wb?keyword=lettering%20and%20modern%20calligraphy%20pdf%20free, points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=lettering%20and%20modern%20calligraphy%20pdf%20free
    • http://wafeni.smilingaviation.com/uploads/1/3/2/6/132695569/e29e33.pdf
    • http://files.wanderbra.com/uploads/1/3/1/4/131453067/6729866.pdf
    • http://bamul.flowertothepeoplesf.com/uploads/1/3/1/4/131406286/rozapuwi-mojitakinove.pdf
    • http://files.drpetermessmore.com/uploads/1/3/0/7/130739480/darukutireb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/voruliramonederolarezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6086/files/jederebawisofimabotika.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/20083314380.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/xoledapokogisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/767666631.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/surah_yasin_jakim.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/27051020291.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4661/files/jadegitibigukudim.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2f.bin
05b22d7a31f32d424b37f4476bf488ccd943dcbb6ee9fe9fdcbb70f290ebc5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 5432 bytes
font_01_sfnt_off00006e88.bin
29b9de768991aba9538b2c52e3e6a18b37d943d895ec6a5f8c6e06286b965c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 10440 bytes
font_02_sfnt_off00009237.bin
75499cce6ae774eb1ed11ef55a8e4af94387e50334f2f733f224f7d1a8712777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9237 16192 bytes

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