Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a40e7276d1de82…

MALICIOUS

PDF

82.6 KB Created: 2020-07-16 15:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b974713a5d21446fa8cece8220a893 SHA-1: 7453b1a5178ab3b1e41d01b33d699c7634163bf9 SHA-256: 20a40e7276d1de828ef2e0103de249ac5760ccd7da204db1de4a54b8496f30f7
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=bones%20of%20the%20cranium%20worksheet'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO manipulation effort to distribute malicious links. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Heuristics 3

  • 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.
  • 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/wb?keyword=bones%20of%20the%20cranium%20worksheet
    • http://files.twistedsugar.shop/uploads/1/3/0/8/130874139/mumujomuwizej.pdf
    • http://files.artgalleryofsnovalley.com/uploads/1/3/1/4/131438362/431192.pdf
    • http://files.amityschuyler.com/uploads/1/3/1/4/131437504/95f970a97d81.pdf
    • http://files.herdiselmend.com/uploads/1/3/1/3/131379991/2de446ac5.pdf
    • http://files.bodyofemotion.com/uploads/1/3/1/3/131378899/de6e671.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/73105635630.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/24264470678.pdf
    • https://viximoko.files.wordpress.com/2020/07/barumeji.pdf
    • https://jekiwex.files.wordpress.com/2020/07/vuxovowizikimomaxevo.pdf
    • https://zanixef.files.wordpress.com/2020/07/pubixidivole.pdf
    • https://bebeleg.files.wordpress.com/2020/06/todegoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/46412061624.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/lovisitivoterewokivetovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/32933612100.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/zosakojamawisubazaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/rinis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/polelolumof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/73597724392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.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_off000107ec.bin
10355db5dfe97ceb260f8ff8ee63f2679c29380bb6306858444fc3a85bce54aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 5176 bytes
font_01_sfnt_off00011968.bin
0a06d0c01eafbb39fde5b434a9b0bfa91ab377c35062753ed18730f0b350d7cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 10368 bytes