Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3be09637b6414a…

MALICIOUS

PDF

53.5 KB Created: 2020-08-31 13:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ae93923c9d93b10a34958431e17454e SHA-1: e8f189f47e4f0eefec8f2c4174c01112940e6d94 SHA-256: dc3be09637b6414a9fe94a114626de5c7610d2cd93a4cfea46feb71912d5d7f1
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the text 'Target audience report meaning' and references 'wkhtmltopdf', suggesting a lure to a report. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate the intent to redirect users to potentially harmful content.

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.ru/pify?keyword=target+audience+report+meaning
    • https://static.usrfiles.com/ugd/5bb01c_7d27e9b8b0d74a5bafe74a026963462b.pdf
    • https://static.usrfiles.com/ugd/f65175_ecb45c7d50fc4b009aca8ec95a9eef9b.pdf
    • https://static.usrfiles.com/ugd/b0b521_c5ca8aa70e2942f9a079022197541907.pdf
    • https://static.usrfiles.com/ugd/5926b4_609e4e4d0cf14a51ae82e3007c6aa863.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/peweliporidexa.pdf
    • https://cdn.shopify.com/s/files/1/0460/9877/6228/files/anycast_m4_plus_firmware.pdf
    • https://static.usrfiles.com/ugd/01e791_ff43e951619c4dd196031c31716fc520.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f434805ddda4e75bd6a79c4399aa167.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/66484759431.pdf
    • https://cdn.shopify.com/s/files/1/0437/6641/5514/files/2026375874.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074fe.bin
24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FE 6588 bytes
font_01_sfnt_off00008578.bin
1f5c053ec49e2ed5eab81409e6b9aa8f23f967ca62529c164c5c2582fd72d1b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8578 5132 bytes
font_02_sfnt_off000096d1.bin
97b72aa1cf1e51d5edae04b5d449ea07a00970e996a52ddb91e82cf60672889b
pdf-font-stream PDF embedded font (sfnt) at offset 0x96D1 3296 bytes
font_03_sfnt_off0000a405.bin
17c1515f87e56c7be9efadeaf7882ab278e26b2cd133030ad71ff0a39b9711e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA405 10788 bytes