Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b180d2edc964e4…

MALICIOUS

PDF

52.2 KB Created: 2020-07-24 22:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4bcb0ab084e66116c38f7b35bb474cd SHA-1: 8280d0e4622713d6e1cd758598ea6fc24cf13de3 SHA-256: c6b180d2edc964e4b2b39932cfe40538925a25038b1ececdc2065d04c06de733
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by a PDF SEO link farm heuristic. The embedded URL points to a redirector that likely serves a malicious payload, disguised as an Adobe Flash Player update. 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=adobe+flash+player+for+android+4.+x
    • http://files.nashandcothreads.com/uploads/1/3/1/4/131438180/ferojigorisojebu.pdf
    • http://files.reading2reading.com/uploads/1/3/0/9/130969555/49253ecafb.pdf
    • http://files.fimc.info/uploads/1/3/1/4/131438784/josizabevixo.pdf
    • http://files.pollyreid.co.uk/uploads/1/3/0/8/130873791/1837094.pdf
    • http://files.dsccstandish.org/uploads/1/3/1/6/131606366/dde26fc.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2172/files/kipog.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/funutulivukasos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/wakudawabeguxajutaxip.pdf
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/vuwovuzagivawojexe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7460/7514/files/rusatamufoxuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/530012809.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/29917821065.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/dazululegodexutewisupaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/69767044187.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/61557386468.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_off000084d5.bin
d7d6e2d856cf67c7a05902486af2aca5a15aea06b88b8607806c2ebd1c1ef78b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D5 5256 bytes
font_01_sfnt_off000096aa.bin
90d5b2df4dfadb5acc28c44d5d61a18464e37edbd12e5768f81e16f7473e8246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96AA 14452 bytes

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