Malicious PDF — malware analysis report

Static analysis result for SHA-256 020567b0a370d12f…

MALICIOUS

PDF

47.9 KB Created: 2020-09-22 22:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec464efeaf8b563de41415bd40f3981b SHA-1: e9f72aadf5c47dc343bb41158d2dcd821eb8550e SHA-256: 020567b0a370d12f3cf6f0bb6fac93977355ad2eea9f3e02d9d924a0fc8abacc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=shut+down+your+screen+week
    • http://nogapok.bluebutterflycoffee.com/uploads/1/3/2/6/132683071/komufidirajaz.pdf
    • http://judoravo.kaseltravel.com/uploads/1/3/1/8/131856158/1139922.pdf
    • http://pitokok.nikiahseeds.com/uploads/1/3/2/3/132303195/d4c8dba.pdf
    • http://files.4therochesterraiders.org/uploads/1/3/2/6/132695301/pufolik_dugesiwexinexip_midewamitexaj.pdf
    • http://mugubi.friartucker.com/uploads/1/3/2/3/132302794/fc89d230ac74b7.pdf
    • http://vadudili.fortere.com/uploads/1/3/2/8/132814969/kodekikaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://509a5199-9355-41a9-8a8b-a96e80ffb898.filesusr.com/ugd/e2c223_38f4461964c845639d7349776e7a17c6.pdf?index=true
    • https://c794cf98-3964-443a-8f79-d50ec4cc838c.filesusr.com/ugd/1c8c1e_365408eabdc646b1b19343f7d38f2431.pdf?index=true
    • https://2e24bf84-48f2-457b-96f1-b9a4f2f0bee7.filesusr.com/ugd/469aea_89a2ce728fed41288c835abbd60bebd6.pdf?index=true
    • https://7a60a8b4-84d2-41ef-a12c-eb34b20e62b1.filesusr.com/ugd/ee6770_bd6982b5d06f4c0b964fbeee818b64b1.pdf?index=true
    • https://bc0d8dcd-10d0-40eb-ac99-06dfc4c78098.filesusr.com/ugd/cb4a18_7927e0fd07e14bc2946e274d754f8e2b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/5261/1222/files/dosubazusuj.pdf
    • https://cdn.shopify.com/s/files/1/0462/4315/2032/files/skialper_buyer_s_guide_2017.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000700b.bin
bd552324bd539f6373a8b67d7c3c050cf55f58beb9dd0d37222822c5136deebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 4980 bytes
font_01_sfnt_off000080ff.bin
ee2f703dcd9ec30b67a7d2025ebdd91abed495da928aa78ec46166a26f575e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FF 10504 bytes
font_02_sfnt_off0000a4ed.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4ED 4324 bytes

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