Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab9611297389e4c…

MALICIOUS

PDF

36.2 KB Created: 2020-08-13 22:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76e5dc8f30b1443ccb8d188ee543c4a SHA-1: f67ee05f509c0d0841ec4b8bac522e794f645b6d SHA-256: 9ab9611297389e4c961b2ffcacd86569e0f118fe097d2ac0e4d280339e3416b9
150 Risk Score

Malware Insights

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

The PDF contains a link disguised as sheet music that redirects to a known malicious infrastructure. The PDF also features a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs points towards a delivery mechanism for further payloads.

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=russian+roulette+rihanna+sheet+music
    • http://files.digitalspecialists.org/uploads/1/3/1/6/131607866/gozel_wabobifira.pdf
    • http://vemadebas.barbaraervin.com/uploads/1/3/0/8/130814328/7056859.pdf
    • http://subuv.anactortravels.com/uploads/1/3/1/0/131070786/3760229.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5734/files/pezukijofugenag.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/leditofim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/zolorofoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/toyota_corolla_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/4461/5830/files/70850596676.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/50104186948.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/42154489281.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/woporavanasasoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96258555683.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/nibavid.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/81636679686.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_off0000501d.bin
8fbcaf6cfa1f8885fe5f1c5eaa1320eeb85c269aa6dc37c3084f7a98fb3b5c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x501D 5044 bytes
font_01_sfnt_off0000610e.bin
5708e7c18fa57f74f588b18ffe0697ba3ecd8dcf05ef2a6d0ccc6dc40c3c9216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610E 10128 bytes

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