Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aef34a0bf79fb56…

MALICIOUS

PDF

35.6 KB Created: 2020-08-07 07:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac215747b4ef03f9a557353e494502ab SHA-1: eb294b15e037e02efbafaec712d4fc59b387334a SHA-256: 2aef34a0bf79fb5672f81eeb519fba0e4f6f512b86586e310f2fdc399130b393
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Disney trombone sheet music pdf' and references the wkhtmltopdf tool, suggesting a lure to disguise malicious links as legitimate content. The primary malicious IOC is the redirector URL which likely leads to further compromise.

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.ru/pify?keyword=disney+trombone+sheet+music+pdf
    • http://files.comedianambrosejones.com/uploads/1/3/0/7/130776393/xiguwajumu.pdf
    • http://files.promegauk.com/uploads/1/3/1/4/131411542/155ced.pdf
    • http://files.kb-cpa.com/uploads/1/3/1/3/131384679/47cf2956bb5cb0.pdf
    • http://files.jordandeadseaminerals.com/uploads/1/3/0/8/130814631/fa0c2b1c1b12.pdf
    • http://dijalod.updatescentral.com/uploads/1/3/0/9/130969754/sotazozilititetosoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/favetejozozutilosel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0770/files/89641698659.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2340/files/55461952984.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/65478089306.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/bejewetiwisiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/89217479597.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/87829491616.pdf
    • https://cdn.shopify.com/s/files/1/0439/8078/3774/files/nvidia_virtual_audio_device.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/49795277723.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/essentials_of_corporate_finance_8th.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/mexinuruzupenobozo.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_off00004d84.bin
6da33c3a8553edc3d6411988defeda113814fd77751ad130208918124b124ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D84 5396 bytes
font_01_sfnt_off00005fb8.bin
ee28ca1eac25a871e60f59c17b197b38924431539ddfebb385993623acba0efe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 9804 bytes

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