Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcea397e4ae9b597…

MALICIOUS

PDF

40.2 KB Created: 2020-09-06 17:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b880285df10fa70bc93c1576e2b0c95 SHA-1: ddbc209f45d7e8ae1d33d3aaad7ecc97d77c0dbe SHA-256: dcea397e4ae9b5973a69d7447bafaabe24d121faeae37620b7833bc3632e1945
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.me, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text related to a Chrysler Pacifica user manual and the malicious URL, suggesting a social engineering pretext. The presence of a PDF link farm further indicates malicious intent to distribute links 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.me/wix?keyword=chrysler+pacifica+2005+user+manual
    • https://static.usrfiles.com/ugd/1c8c6c_d12edd48a205488a8d567fab0b5a4be3.pdf
    • https://static.usrfiles.com/ugd/f0f215_d6ee4297519f4e78bd663ee8b4d5c887.pdf
    • https://static.usrfiles.com/ugd/f95141_09687cc873ce4c3a838f2a2a34f56431.pdf
    • https://static.usrfiles.com/ugd/724fb5_2ec1d0cb04604bdfa358b929d81ba04e.pdf
    • https://static.usrfiles.com/ugd/55e2c6_f360faefa3c54328b4878fdffde4fe74.pdf
    • https://static.usrfiles.com/ugd/4d548e_f2ee00a95bf043678a07556646c957d3.pdf
    • https://static.usrfiles.com/ugd/a382ee_1f91b87e8bd34574a0104f17ecd4588f.pdf
    • https://static.usrfiles.com/ugd/704566_6279f2e7d48b4e8895889f11f42fd611.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/skate_3_rpcs3_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/teleprompter_software_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/21987932995.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0462/4642/8823/files/personal_traits_worksheet_employability_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/wevobuxejoxiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/40890615581.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_off00005f40.bin
7f627d354ae29fd5d3d0143397b89b4ea3593449f95e57769325fd21e8b0bc26
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 5660 bytes
font_01_sfnt_off0000725f.bin
aa3d1822d5a634bc4e5e3118edfc339435861bf444f998366b9129295dd50178
pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 9924 bytes