Malicious PDF — malware analysis report

Static analysis result for SHA-256 378aa5381427406d…

MALICIOUS

PDF

59.9 KB Created: 2020-08-30 13:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4482ab20e41b47e4eac65bcffdd47c2 SHA-1: 93de0683205dc9905a1e2dcf64029772c39f090e SHA-256: 378aa5381427406d12a423ed0ba17c7cc0c94a181091dc5967c197f559ef72cb
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic identifying a link to a known malicious redirector. Additionally, another critical heuristic detected a mass external PDF link farm, with the primary URL pointing to a redirector. The ML classifier also strongly indicated maliciousness. The embedded URL leads to a redirector, suggesting a phishing or malware delivery 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/wix?keyword=utilisation+de+la+matiere+organique
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/2872138284.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/78529952643.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/wurafavepupojikemev.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/powime.pdf
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/kotumuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/ielts_band_descriptors_listening.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/durabenarugopuzado.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/15897488273.pdf
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/78803486573.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/31936373392.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/99588071463.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/17727225541.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6107023b70e4a7ea57c0ffb23a090bb.pdf
    • https://static.usrfiles.com/ugd/87fdc7_cb68b0e6901f469ea04ff2d4b13e3d30.pdf
    • https://static.usrfiles.com/ugd/0c4177_d277156f4c274b818ebbac1f852fc054.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/
    • https://static.usrfiles.com/ugd/b8c837_e6107023

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5cf.bin
cddd1f158bcd63fe8b68d8b8af536ecab2e0bcf61d287ea13a08fbfcc9fba268		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CF 5264 bytes
font_01_sfnt_off0000b780.bin
c4197272b06dfc188698a0f2c8625af77b0efe9fd10442b38e454a315403eff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB780 13452 bytes

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