Malicious PDF — malware analysis report

Static analysis result for SHA-256 c142523765e7feaf…

MALICIOUS

PDF

133.1 KB Created: 2020-08-03 02:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbcc3cc480f469bbf1d0489a4660a143 SHA-1: cd82a6c6dac0c898a864569ddefd8021f70b968f SHA-256: c142523765e7feafc46dec074bb4625eb826f980c88a432ff6041daa782f6af9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Fairy Tail 213 english dubbed'. The PDF also contains a mass external PDF link farm, with the dominant host being 'cdn.shopify.com', suggesting a potential attempt to spread or mask malicious links. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=fairy+tail+213+english+dubbed
    • http://files.odabu.com/uploads/1/3/1/3/131384573/gumivu.pdf
    • http://files.birkenheadbrewingcompany.com/uploads/1/3/1/4/131438079/molapul-xulaxumowebexed-mexuw-tegekaf.pdf
    • http://siwevulu.andreasscience.com/uploads/1/3/1/3/131398360/wawefusixo.pdf
    • http://files.newrichmond.org/uploads/1/3/0/7/130775115/259da8d4e7.pdf
    • http://siwevulu.andreasscience.com/uplo
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/2008_lexus_is_250_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/goneze.pdf
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/cat_d3_dozer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/dexitolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/39922404795.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/sqrt_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33971068516.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/44657139421.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/wudes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/85284286486.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/52343846346.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016154.bin
0defd176addd828b9cdc6c98c77102d049c21c123d16f29b8bdeffdd968924d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16154 30748 bytes
font_01_sfnt_off0001c15f.bin
c6194c9142e6ed80886635d21da637f298a058d395837f21824f6255bd35e4ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C15F 5632 bytes
font_02_sfnt_off0001d491.bin
b49c794c2ec396603bb6f5ef94be05ec65b4f643d321068622b79d4345b2c0e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D491 16460 bytes

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