Malicious PDF — malware analysis report

Static analysis result for SHA-256 de994026b250ebb6…

MALICIOUS

PDF

45.4 KB Created: 2020-08-01 16:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad9fb4c7bf1fdeec225977b96d62d0f SHA-1: 64ddc4d3462e10fb462ca74639cd5d97003afa4e SHA-256: de994026b250ebb6d1f147c58b20be40ed13f753cc349932aeca8d8348485ec3
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting the document's primary purpose is to distribute links to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=tzhaar+fairy+ring
    • http://files.martiniboxers.com/uploads/1/3/1/6/131637701/zuriguzo_xudibupe_nonitat.pdf
    • http://files.seaforthdhs.org/uploads/1/3/1/4/131438672/1d4a484522cf.pdf
    • http://files.stevevalentine.com/uploads/1/3/0/7/130776167/fobaviridotag.pdf
    • http://files.jaynereid.com/uploads/1/3/1/4/131438202/jugakefanefugenoripe.pdf
    • http://files.hiebardesign.com/uploads/1/3/1/4/131437117/basobur-labokumigi-xakobix-kujixekiwuxefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/tadogusurega.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/kuvodixaki.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/datadivakofigezarobesape.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/jiliwesewewuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/dajiti.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/baxenazugironud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/42940586576.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/pipubuvawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/viva_la_vidamp3.pdf
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/38417222159.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/kodupaloruf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/70288233405.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/44081271135.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_off00007567.bin
45c74a332f3f137c82aaa8b4075e9624a1d1606bc526a08eb021f90a42a6cb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7567 4920 bytes
font_01_sfnt_off00008632.bin
400960bcd28757e4305e4ce02ea88d3e3e364bf14b182cdbae03b5239b3daddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 10108 bytes

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