Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc20a4df03e43fe…

MALICIOUS

PDF

57.7 KB Created: 2020-08-03 15:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f0e876ada41a671abed6f12a9150a0 SHA-1: 10b72f327a68dd883c6ac459e174f7bc4617166f SHA-256: dbc20a4df03e43fe7d3337950be5dc9aaac415499e44714cbb3e32f4cc035021
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, disguised as a search result for an academic book. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring the user to click the malicious link, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=applied+psychology+in+human+resource+management+8th+edition+pdf
    • http://files.spiritfireretreatcenter.com/uploads/1/3/1/3/131398129/vutesopatobutimoze.pdf
    • http://files.thanhthanhphoto.net/uploads/1/3/1/4/131452794/vawasexipoged.pdf
    • http://files.priorityenvironmental.ca/uploads/1/3/2/7/132740415/poturowinu-pepurefeme-zomoxiru.pdf
    • http://gegaveji.haywardfitnessfanatics.com/uploads/1/3/1/4/131454106/jopagodekavonefe.pdf
    • http://files.rfgamebirdsrawpetfood.com/uploads/1/3/1/6/131637150/zevuxefe-xowakuw-rogalime.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/23649915953.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/44424532842.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/mortal_kombat_nes.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/sawase.pdf
    • https://cdn.shopify.com/s/files/1/0433/4931/1646/files/22666220191.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/56079071110.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/tokopetevakew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/60555171496.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/futilobodilewojowivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/96841573874.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_off00008fe3.bin
7ded2aae704a3903461c0801c09de0b64794a72ca6c5e9e8fcb08fdbe7540a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE3 5852 bytes
font_01_sfnt_off0000a3ab.bin
8506f3b3d281412ef6cab8070bc7cc5851c0ec88cb8ff84d256ec9384c6e3dd7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AB 17284 bytes