Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e50d8041978f71…

MALICIOUS

PDF

35.5 KB Created: 2020-08-11 12:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0ba460ffba36420b272eb3b3b24031 SHA-1: 0ffef1013000f9ea2255de6e7aaf7bf06e6ccabf SHA-256: 89e50d8041978f71ed2d539dbc721df9fc52e342bb01cd80f2ada28685667b77
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one to a known malicious redirector at `ttraff.cc`. The document body, though obfuscated, contains text referencing "careless whisper piano music pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=careless+whisper+piano+music+pdf
    • http://files.aschaxel.com/uploads/1/3/1/6/131637043/3430468.pdf
    • http://files.janestraveladventures.com/uploads/1/3/2/8/132815054/zijogafebiw_lofanoxeximuzi_gokided.pdf
    • http://files.practicalautomation.com/uploads/1/3/0/7/130740429/7385700.pdf
    • http://files.stuffsarahsays.com/uploads/1/3/0/7/130776393/zunasivov-genumojufebasak.pdf
    • http://files.wasatchballet.com/uploads/1/3/1/8/131856330/jalovuzimona_mabakuvajemeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/kaferito.pdf
    • https://cdn.shopify.com/s/files/1/0436/5477/4949/files/81618392555.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/4706997293.pdf
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/5671956037.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/54791427272.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/atf_form_6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/fuwuremirezijeneb.pdf
    • https://cdn.shopify.com/s/files/1/0446/7766/0825/files/cataract_classification.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/60926896945.pdf
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/96937370151.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/gaduwades.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_off00004b89.bin
85d288ec9fe7c9149d33c88beea31b6bd3e12df9ee2ea3ecfa8868d0798f7b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B89 5392 bytes
font_01_sfnt_off00005dc1.bin
113d0629cc13bfdbdc2bf066142e126d785bb2b63c618cf93d93fab7fa6c89dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 10264 bytes

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