Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6681f3b4d57321…

MALICIOUS

PDF

36.6 KB Created: 2020-08-16 20:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9feb16141f85fa0e7a7782c58649d27 SHA-1: ed88e1c26780442087521faf4c8535ac819bdee8 SHA-256: 9a6681f3b4d573210741574427287b945821f8d5e118375a6b6556a459d1e2aa
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The document body text, though garbled, contains a URL that aligns with the heuristic findings of a malicious redirector and a link farm. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=pantangi+o+pambalana+worksheets+for+grade+3
    • http://files.cafeyugo.com/uploads/1/3/2/3/132302940/e03f937d.pdf
    • http://files.courtneyspetandequineservices.com/uploads/1/3/1/4/131452922/dotegopo.pdf
    • http://files.thescarabexperiment.org/uploads/1/3/2/6/132681477/joxaxabodedokij.pdf
    • http://soligawir.betsyathorpe.com/uploads/1/3/0/9/130969742/kabivawabu_xoluner_wesagoxe_kudutesexituliw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/dasafuterijafivujeveduzaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3762/1404/files/84064989678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/30590046279.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/vurerokileponepuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/anglisht_shqip.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/tapaguxopujize.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/30262185704.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/31440225090.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/13852682726.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043be.bin
649f7821068cd088583f90b3ec6eda18da0f489abd6f99fe45dfa28e685c423c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43BE 5704 bytes
font_01_sfnt_off000056fc.bin
29ad1db4e8f92113663f9a22d34a612312435d8517e10841ddfeeabbc12a44e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FC 9488 bytes
font_02_sfnt_off00007788.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7788 4324 bytes

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