Malicious PDF — malware analysis report

Static analysis result for SHA-256 c708d71dee9400d4…

MALICIOUS

PDF

106.8 KB Created: 2020-08-03 15:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5ce7027fe0fcf4a953c75d1cb4c5995 SHA-1: 23352d671669131b694168be2b5a32eb2458855c SHA-256: c708d71dee9400d4991a3afb013a60f601cdf07583e47932131b604eedb97c4c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-Override

The PDF contains a significant number of embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=deadline+definition+pdf', is a known malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting an intent to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=deadline+definition+pdf
    • http://files.modelmefamous.com/uploads/1/3/0/9/130969926/tagipilupadodu.pdf
    • http://files.topnotchphorses.com/uploads/1/3/1/6/131606056/4440146.pdf
    • http://files.rockcliffetennis.ca/uploads/1/3/0/7/130739112/7048088.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/kexamaxulapujewuvizufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/netimuxoladofebagod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/12213776217.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/rojazofupeju.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/bopimavis.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/givogamusupozafitimuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/34230651977.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/6897385238.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/sozelezini.pdf
    • https://cdn.shopify.com/s/files/1/0440/4668/0214/files/act_parser_ffxiv.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000e1c4.bin
206e0ddd448b839fcbb54ea3104f828fa8f50db387f3eba6f6d8907278fb3bf5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE1C4 11148 bytes
stream_007_off00014bb6.bin
413b039e3db50185658b8de7b390da1be36ff5dcfb415437f600c9b88bfd89d8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14BB6 31716 bytes
font_00_sfnt_off00009ae4.bin
1fe2b7a8ed46b346660790398da04ccacb8fe81b45f7929d9659fbc523069068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE4 16744 bytes
font_01_sfnt_off0000d17e.bin
388ef0e0ec8bc70f84fbedfa3f03687ba93a1c266248d4c995fd344af3c311e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17E 4760 bytes
font_03_sfnt_off00010084.bin
22ba4190c4442e582faf01f2a7829374d437ac7db82ecffaf67f1e6ee466a735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 27768 bytes
font_05_sfnt_off000182bb.bin
aab74e20269f310904d75befebcb3be910097a7e0fcf7f67d0c0a5d714f0ac7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182BB 7744 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.