Malicious PDF — malware analysis report

Static analysis result for SHA-256 f008f55716b05f7f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 20:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a39a4677b14b4efce6b026c89b8c03 SHA-1: 3965b9171f5df6233ad82e733a5fead09615bbd0 SHA-256: f008f55716b05f7fcc2384bb0ec84e4ad616c267e6ff3c5cd2821f7fa3a53ebb
152 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector infrastructure. This redirector is designed to lead users to further malicious content, likely a phishing attempt or malware download. The presence of a link farm and the ML classifier's high confidence score support this assessment.

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/wix?keyword=digimon+cyber+sleuth+cheats
    • https://static.usrfiles.com/ugd/f0e51d_40ae68868f3b4535a068a75423aeab1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_909093583bfc4f7880e0198000c6c45a.pdf
    • https://static.usrfiles.com/ugd/0a052f_c645c535dd274967ab414781dd427b68.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/58308343826.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/94612012799.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/vidixodozafuzirevevem.pdf
    • https://cdn.shopify.com/s/files/1/0438/0704/7840/files/adobe_premiere_pro_amtlib_dll.pdf
    • https://cdn.shopify.com/s/files/1/0436/8308/6489/files/96972478395.pdf
    • https://static.usrfiles.com/ugd/b8c837_5df9caff6de54f7495ebebf00a58924b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bcc5f2c98884778aaea515996663cd5.pdf
    • https://static.usrfiles.com/ugd/ea78e0_0ff96230dc504fbba3291fba5c105e21.pdf
    • https://static.usrfiles.com/ugd/0511f5_64fa385739154a28b696d2ce7741bfa7.pdf
    • https://static.usrfiles.com/ugd/c5d40f_8e6dd51b99f7492cb5539bc606c96974.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/statistical_methods_in_quality_control.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/15931009487.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_off00006302.bin
786ff8ba732dd21a13fa0a13366213d93bd2d5f125e0bf7470774dd7bc0f29d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 5456 bytes
font_01_sfnt_off0000756a.bin
70ce33d3067cd789dccc4ef20900a2c35353b905382886304c2aaa9470dd0e4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 10420 bytes