Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9183a4844d8d676…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 00:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e323246704f0bbca75e2186bebfd13e2 SHA-1: b6ceea2fe6d7fa8597dc38e9db1b88b566eb3a0e SHA-256: b9183a4844d8d676842cb4460267dc5b37ca958b43c8c34150794127f45ffc88
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to host malicious content. One critical heuristic identified a link to a known malicious redirector. The presence of a 'Visible LOLBin command execution instruction' heuristic suggests that the document may also contain embedded commands or scripts intended to execute malicious code, though no specific script content was extracted. The primary attack vector appears to be directing users to malicious infrastructure.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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/pify?keyword=jspdf+auto+table+cdn
    • http://files.dominicmartinez.com/uploads/1/3/1/1/131163687/pavimokivaton-guguwezobiluf.pdf
    • http://files.gcmdazzlers.com/uploads/1/3/2/6/132695361/xogikawi_sefujobavoku.pdf
    • http://files.hotstuffnmore.com/uploads/1/3/0/8/130814043/daguvirexof.pdf
    • http://zupoguje.mekicartgallery.com/uploads/1/3/0/8/130813945/9530648.pdf
    • http://files.bluecreekcanine.com/uploads/1/3/0/7/130776535/sobejeretos_medaxapuxeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/all_my_loving_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/nys_notary_public_practice_exam_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/lerubolexiwip.pdf
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/endometritis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/fuxij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/jutejumigepetiwebe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/xonegewijoruzakewaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/nemuzugizetamujenovip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/87409399416.pdf
    • https://cdn.shopify.com/s/files/1/0431/4736/2453/files/conjunctive_normal_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/gotosozenevubos.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_off0000639f.bin
80fcd8952ff55d194f0ccccc6ee0859379e4dad4af057b08c0989bc6fcb78fd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 5184 bytes
font_01_sfnt_off0000754f.bin
6880414b6785ba515311882971f2c101a739e52baa4b3aeeed4f7830f07e92ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 14564 bytes