Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff54f38492ce6fd1…

MALICIOUS

PDF

32.8 KB Created: 2020-08-18 20:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d097b7691fec652cd532b96255b64e5 SHA-1: d2a7847668ea88aaf2e39b42425a46b60919c474 SHA-256: ff54f38492ce6fd1d5677914db95ee3c56a6c532ab32d48a39e84b909eb621d7
60 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://ttraff.cc/pify?keyword=grammar+bytes+parallel+structure+answer+key', is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a 'Grammar bytes parallel structure answer key', suggesting a lure to entice users to click the malicious link. The file was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

Heuristics 2

  • 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.
  • 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=grammar+bytes+parallel+structure+answer+key
    • http://files.birchlanddental.ca/uploads/1/3/1/6/131606069/d2f2d7356988a.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/xanakanisofebinus.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/figifibasekivabavodew.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/mibobapekul.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/wubokoxupofuvegewoxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/31002527173.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/rawikejiva.pdf
    • https://cdn.shopify.com/s/files/1/0439/9126/9534/files/important_banking_awareness_questions_and_answers.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_off0000444d.bin
08470d08eaf063de8de2781989cb5e549718f8c2f86e5b7e4f4036dd22cbf875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x444D 5508 bytes
font_01_sfnt_off00005714.bin
acf2deebd0826c423673c03a21acb3607a4c35517108f84f9b7c45947d2bf4c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5714 9284 bytes

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