Malicious PDF — malware analysis report

Static analysis result for SHA-256 8062b5040b4993e4…

MALICIOUS

PDF

48.6 KB Created: 2020-08-22 17:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 027e8123a7a239c0152c8cd00fbadb1d SHA-1: 44f3c5d933100ccf1a77fa10ebe4865f99746fe9 SHA-256: 8062b5040b4993e43bda1a648464206543259e7f0655a2aba5b638fc840aca8e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. It also includes instructions to disable security software, indicating malicious intent. The ML classifier strongly flagged this PDF, and the presence of many SEO-optimized links suggests a link farm designed to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=autodesk++manager+connecting
    • http://dibesefet.levinoguess.com/uploads/1/3/1/4/131483372/xiligiminilawekev.pdf
    • http://files.juliroseflower.com/uploads/1/3/0/8/130814644/liteji_gozorep.pdf
    • http://tebodati.creatorsdigitalmm.com/uploads/1/3/1/4/131453284/9252712.pdf
    • http://files.filmworx.org/uploads/1/3/1/3/131398129/bulaji-lidesekibagen-dupofod-libibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/double_linked_list_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/vasafagubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2824/files/nirilegedek.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/ziwoweguvesowovire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/woliwikomiguvabotosun.pdf
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/kovilekufopim.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1715/files/aluminium_cladding_details.pdf
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/58402878254.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/t._i._rubber_band_man.pdf
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/gafilexetepene.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/discord_fredboat_commands.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000701a.bin
cbbcf3a50db18b20dbdbfdeba399d5692028562b00b37b2e87f995b4df88b846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701A 5160 bytes
font_01_sfnt_off00008184.bin
fd3fe3629d8e12e38f79e09acc9ebd42e1f39bde5ea6b75b10503e23ff973504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8184 11024 bytes
font_02_sfnt_off0000a71a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71A 4324 bytes

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