Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a69732e5ae0497…

MALICIOUS

PDF

59.5 KB Created: 2020-08-07 09:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8700bb5e179ed2cb9620d66f6b3dd45 SHA-1: 7bc706fe3f7b5c89bd7e6cae50d9b10a8c49d8d5 SHA-256: 94a69732e5ae0497248a3fe8ca61ca3ac9473cdfe0cc15a4643aa5535a903f58
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to other PDFs, a technique often used for SEO poisoning or to obscure malicious destinations. One of these links, 'https://ttraff.com/pify?keyword=un+amor+de+invierno+pdf', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

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=un+amor+de+invierno+pdf
    • http://files.odysseyaromatherapy.com/uploads/1/3/1/3/131380546/luzizulibatem.pdf
    • http://files.lakeshoremiddleschoolpto.org/uploads/1/3/2/6/132683017/6e9e21c5312a0c7.pdf
    • http://files.guitarvguitar.com/uploads/1/3/1/4/131453897/5309067.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/wobajokege.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/love_after_marriage_romance_urdu_novels_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/84000925260.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/remington_serial_number_lookup.pdf
    • https://cdn.shopify.com/s/files/1/0446/6160/4505/files/nyc_210_form_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/hunger_games_2_ita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/61453166190.pdf
    • https://cdn.shopify.com/s/files/1/0440/2046/5829/files/jefuzatokexejisifage.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/my_crown_fell_off.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/lexigow.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c8.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C8 6440 bytes
font_01_sfnt_off000082bc.bin
a4a18983354da4b05fbb0e5d0638dc2d6a6c90aef4c55b6c723c81b82bb659b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 5028 bytes
font_02_sfnt_off000093c6.bin
db539eb0b13aaefa3decf1bd0b6f31ff40314dd45086615180febf5ef6030708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C6 5648 bytes
font_03_sfnt_off0000a379.bin
8eb5b3cd991a5cf2a643c4d708f147c6eabbd73235628733f1c4154a27f7c5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA379 11204 bytes
font_04_sfnt_off0000c830.bin
569b73f965e4edd202bd5b147228be71cf58be4cd74f7d138c1d3fd9f0eab53c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 16548 bytes

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