Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bbbeedd3b27a39…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 04:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05e88c24f5438b40d02570f687c912ed SHA-1: 27fe061f56898400cea752cce03ab0b7e3a13d32 SHA-256: 96bbbeedd3b27a3986bed61b8569ad29a54dad9318e384a5c5a5b3fb72e84036
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as sheet music, aiming to lure users to a malicious site. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the ML_NYX_PDF_MALICIOUS flag indicates a high probability of malicious intent. The embedded URLs suggest a link farm or redirection scheme to distribute 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.com/pify?keyword=hey+jude+piano+sheet+music+musescore
    • http://files.hypnobabiescoloradosprings.com/uploads/1/3/1/3/131383949/salasujugavuzifumi.pdf
    • http://files.fear-lesstherapy.com/uploads/1/3/0/7/130739265/1207411.pdf
    • http://foxigug.elcequestrian.com/uploads/1/3/0/7/130740444/febedelunez.pdf
    • http://files.masterclassbudapest.com/uploads/1/3/1/3/131398259/delirobufukoxis-rudovizikelex-nulomigeforudid-kulapenefeba.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/xituxoritonenuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/41970403633.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/wenofovasezanesokogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/75036653711.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/kidap.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/fawevenowitad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/cafta_certificate_of_origin.pdf
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/muppet_treasure_island_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/40442035273.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/screw_thread_types.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_off00005b12.bin
d81ba2af341b2c992d9a7d2bbd7e5d3493b77c0475d88a49024d2ecd415f43d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 5420 bytes
font_01_sfnt_off00006d5e.bin
96964110f06c85f8310ea185060f8602dfec0c7289b94dd9350a7af60c6f0955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5E 15376 bytes

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