Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63cae068a83de24…

MALICIOUS

PDF

38.6 KB Created: 2020-09-16 15:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 700ad1e4d82a0fdb82d2d4715aae8eeb SHA-1: 0f8cbfa9884e88376ab094656b3b41d400d1e6b0 SHA-256: a63cae068a83de249d0010b8142e8a33998fb5207ff909fc7d9365a03b532a9a
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm, aiming to attract users searching for specific academic content. The primary malicious URL identified is https://ttraff.me/wix?keyword=world+history+chapter+25+section+1+assessment+answers, which likely serves as a gateway to further malicious content or phishing pages.

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.me/wix?keyword=world+history+chapter+25+section+1+assessment+answers
    • http://files.kelseybetzelberger.com/uploads/1/3/0/8/130873893/nezolorej.pdf
    • http://zuxumomup.diplomainprofessionalstudies.com/uploads/1/3/2/6/132680981/zoleve.pdf
    • http://tiluwami.plateauvalleyanimalhospital.com/uploads/1/3/0/9/130969627/b893b.pdf
    • http://nuguna.colorsandspice.com/uploads/1/3/2/7/132740435/tovejemaliwovaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/7047553825.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/wulagus.pdf
    • https://fcf8f566-e1c3-459b-9535-2bcd986f33b8.filesusr.com/ugd/18ee90_0c2692b0a2ad4f999b29908e5115d93d.pdf?index=true
    • https://560535e6-3980-4a8f-bd55-772296553591.filesusr.com/ugd/3a38e0_0ace9de55c294d299a1faa4744541e43.pdf?index=true
    • https://47f732b5-665f-4ced-b145-12ce2aedc218.filesusr.com/ugd/696117_29d13f01dbae4208870eb28ae2367598.pdf?index=true
    • https://47a49c36-7e1e-44dd-af74-a6ad1fad3125.filesusr.com/ugd/696117_0063329a1ac34806870f2d85021c96f6.pdf?index=true
    • https://2ab2f809-729b-4126-9a2e-8111a8d717ac.filesusr.com/ugd/cc3ca9_cee4d891197b419dba1219d135f9ed70.pdf?index=true
    • 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_off000053b8.bin
ac878c4205bfc478fa543c62d465c23648e1917af3b66297dffd974c7711aa90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B8 5828 bytes
font_01_sfnt_off0000678d.bin
4b44c0b1a1c429882831efa63307d7d63027517180161fca02c5a6b34276d4ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 10740 bytes

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