Malicious PDF — malware analysis report

Static analysis result for SHA-256 d563d7657fe13ce3…

MALICIOUS

PDF

44.5 KB Created: 2020-08-29 22:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20a80438a6b2c7f719d9309cce8f62c4 SHA-1: 47e1b459be5f0819e1230a853623e47078f29edf SHA-256: d563d7657fe13ce3677147dd31f4a0e765fe6d2255c2fd8bcb532af3247c3830
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Elite dangerous combat tips". The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document.

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/wix?keyword=elite+dangerous+combat+tips
    • https://static.usrfiles.com/ugd/b8c837_5eacee2a93254c0b9deddc85a31da4c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e363015ff504085a3de576f5df0ec33.pdf
    • https://static.usrfiles.com/ugd/05900a_00b2da23aecb491d9961e5936ed3b136.pdf
    • https://static.usrfiles.com/ugd/b8c837_c51e1c9b1d3b42b285be0c176583e626.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b522b4db0354ce3b6b1b87d5fc3bc7c.pdf
    • https://static.usrfiles.com/ugd/8ab72e_4082834ec14d45da921e3455db0bb93f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b8b56e6394a4707b793847a6be78198.pdf
    • https://static.usrfiles.com/ugd/ca32a8_e98b6a797faa4272abedfd963a9466df.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed536c551f6d4fe598612885ea3fa6c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5f91fc01d3d434e935edade824eab65.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b6c745be44b4880b4906a0e94e2621d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a12b8c2a6b14c78b162a8183953af0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad7cc70127894752a6edcde9a54c9e06.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_off000061e0.bin
41ebc0e7f1a2e5f1bbf521e7a14c9635fe6048776a40d29d24fef34dcfec4425
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 5492 bytes
font_01_sfnt_off00007460.bin
5822957dea379138de9c4d344fab9172eea058cdfefdd095602fba0a53acbf29
pdf-font-stream PDF embedded font (sfnt) at offset 0x7460 2196 bytes
font_02_sfnt_off00007e5e.bin
dd557a0499fd5b0bcb0f671e98cdbcb67db507c786ddf8dfe891d0247ac0c92b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 11828 bytes