Malicious PDF — malware analysis report

Static analysis result for SHA-256 32106d02fdd34433…

MALICIOUS

PDF

38.0 KB Created: 2020-08-08 04:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b78b7cee43202976ff64527eafcf19c2 SHA-1: 5e3602be495ea5e13360d4f42d64800ac437a50b SHA-256: 32106d02fdd34433ebe2117f646de56d276523c6d300584220705df18873a4e1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this document. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URLs.

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.com/pify?keyword=because+of+your+love+chords+pdf
    • http://files.bienfemme.com/uploads/1/3/2/3/132303170/6563051.pdf
    • http://files.backtothepastresearch.co.uk/uploads/1/3/0/7/130776006/4846223.pdf
    • http://files.freehillblades.com/uploads/1/3/1/4/131437335/nitomurej-gupeza.pdf
    • http://zozurer.southamptonotars.co.uk/uploads/1/3/1/4/131452883/6cf498db007f0.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/57929479749.pdf
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/saledofesemosijirasega.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/50392879365.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/19064097568.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4195/files/7_11_beyonce_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/anaphylaxis_action_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/blood_vascular_system_of_herdmania_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0514/7298/files/github_squash_commits.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/bimapara.pdf
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/manual_dexterity_definition.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_off00004b3f.bin
398fafa829d43eb9eb95640999d0a1cfe04e62d2db5600eb86b02c2715910ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3F 5452 bytes
font_01_sfnt_off00005dd6.bin
80d81014551d9c055205c3b4f9666610022f3887b72c36649212f60843d60e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 13964 bytes

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