Malicious PDF — malware analysis report

Static analysis result for SHA-256 905669c6a0f823b2…

MALICIOUS

PDF

41.0 KB Created: 2020-08-04 23:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f0355c18793fdbe179ae3c7a991b8e6 SHA-1: 6375b7d019ecbee10fbcd1c1ea80b645fc5fc862 SHA-256: 905669c6a0f823b272c9cb5c735e62717ffb72ec7d2f097adffa78024f6ceee9
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=techos+verdes+bogota+pdf, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains embedded URLs, reinforcing the malicious redirection attempt.

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.cc/pify?keyword=techos+verdes+bogota+pdf
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://files.projectyouthextension.com/uploads/1/3/1/4/131410812/9024539.pdf
    • http://tadaxor.seedsborntolight.candletothesun.com/uploads/1/3/2/6/132696111/6920c.pdf
    • http://files.cathywilmot.com/uploads/1/3/1/3/131379732/7616290.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/54540845104.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/28687986157.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/vuvowemudefomopusoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/53855232879.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/zonagabumoxolu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/xonujutunadetelisozazug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/root_explorer_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/class_9_science_atoms_and_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/xumebili.pdf
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/65153232106.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/22557034239.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_off0000605c.bin
211566297c1102a49dc1ae4681db200c0434bc0c217a079eccff1a935d33e81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 5532 bytes
font_01_sfnt_off00007326.bin
062e44b6620c1ddad7d27579478499392f9e2345979fad3e173e93c31897b639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7326 10660 bytes

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