Malicious PDF — malware analysis report

Static analysis result for SHA-256 220ee733271de646…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 05:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ed0fea4033caa6a8ebd6763f653053 SHA-1: 0f23b7f1c0597588da85761a9f0183c89f0688c0 SHA-256: 220ee733271de646e7b169b72dde50b99d0547f2bcd774c9124eb954f1450d4e
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a coloring sheet and the malicious URL. The primary attack pattern involves tricking the user into clicking the malicious link, which then redirects to further malicious infrastructure.

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.com/pify?keyword=god+loves+a+cheerful+giver+coloring+sheet
    • http://zulin.tacomansd.com/uploads/1/3/0/7/130739916/jamamutu_datukutadi.pdf
    • http://files.greenlightliteraryrescueservice.com/uploads/1/3/2/8/132814343/paxatoxugov-nemola-guvubamuvufex.pdf
    • http://files.carlylelabuschagne.com/uploads/1/3/1/6/131606392/1247799.pdf
    • http://files.canadagripsport.com/uploads/1/3/0/7/130775268/dobalebow.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8135/files/jafakorikakimif.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/74240037676.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/36262391355.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/simenizupezisenujaxuvuka.pdf
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/skyscale_lost_guide.pdf
    • https://cdn.shopify.com/s/files/1/0447/3189/1861/files/hung_s_difficult_and_failed_airway_management.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/54789328677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0436/2433/3472/files/super_mario_world_rom_gba.pdf
    • https://cdn.shopify.com/s/files/1/0447/1973/4938/files/mm_dd_yyyy.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_off00005e92.bin
443e7b2a48da2f7db03682265c80c00c7647ff35afc2e69a9c76a34c646cc4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 5376 bytes
font_01_sfnt_off000070e0.bin
ca9474249e4ffe29c2b05afce053f6ff8bc265ed6e1dd601c2422042ca27fe70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 10064 bytes

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