Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49127252fca248d…

MALICIOUS

PDF

46.6 KB Created: 2020-08-12 02:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0229bdd9437b84380a7e34a3ffbb76fe SHA-1: 1e1702659fe856759731ea696b833dc79dd3b70c SHA-256: c49127252fca248dabea8dc9717671fea4fd89cd5513b92e4cb0ce7e51c3e2d9
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=las+autolesiones+pdf as pointing to known malicious infrastructure. The presence of a large number of external PDF links, as indicated by PDF_SEO_LINK_FARM, suggests a link farm or SEO poisoning attempt to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body and heuristics point to a lure designed to redirect users to harmful content.

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=las+autolesiones+pdf
    • http://files.liberalcoalition.com/uploads/1/3/0/7/130776592/7655216.pdf
    • http://files.cptoffice.com/uploads/1/3/2/6/132681757/9440114.pdf
    • http://zubovedu.livehealthywithcancer.com/uploads/1/3/0/8/130814535/1d6637a29dcd.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/83656553473.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/58102177087.pdf
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/40699961060.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/podaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/google_academico_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/66353085274.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/39120784544.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/71315394876.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/zavejomapuzonakowusujaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/28465770011.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/jakoxojovib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/11256548716.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_off000076eb.bin
b02ce72135c50ce63db5db6313b488e4b9e41068df601d7c64376a8a183728b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 4880 bytes
font_01_sfnt_off0000879f.bin
ce6685cabc9dc6ff289f324a5b9dfbb32758c2184256144e83751a15909d358c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 11336 bytes

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