Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2453b33c1d66280…

MALICIOUS

PDF

62.7 KB Created: 2020-08-04 20:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e11f7d741d75010f188aa70421673499 SHA-1: 6104aa67b14bf7ba25823c227e1aa842fe6f78ca SHA-256: e2453b33c1d66280aaac1e28e9b9d1e8d8030d44b8ee5208d57f02029aaa3df5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=aleister+crowley+libros+pdf'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to generate traffic or distribute content through numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the attack pattern.

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/pify?keyword=aleister+crowley+libros+pdf
    • http://files.farsouthcoasthominoidevidence.org/uploads/1/3/1/4/131406663/e699542.pdf
    • http://files.dealerschoiceaccessories.com/uploads/1/3/1/6/131607053/sarad_pofoguzozoxiwav_jetef.pdf
    • http://files.mfhenna.com/uploads/1/3/1/8/131857114/bemujewes.pdf
    • http://files.bearlakecounty.info/uploads/1/3/1/4/131437005/9a05bb2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/20485689963.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/44436192627.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/29850141089.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/36183945114.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/juxetirajomozafakuzefab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/84851077092.pdf
    • https://cdn.shopify.com/s/files/1/0434/7936/7846/files/62555277906.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/kawasok.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/discord_delete_channel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/tatifikuti.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/68780634299.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/9932569421.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/zabezul.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_off0000b737.bin
18e0d5d879a5c8c469b65c14cd1e78d35ad442d5ccb47254b1008195c04bbea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB737 5264 bytes
font_01_sfnt_off0000c93f.bin
aa2113ab03265067812d2442c3a542a276cfd24e001031089dca8b39a046a794		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC93F 10540 bytes

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