Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb00d5d670fecec4…

MALICIOUS

PDF

35.2 KB Created: 2020-08-17 06:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6858eb09b733b9644bd04e69d0fe20db SHA-1: 0d8e9df5afce541c1e79275775aec5454a6465c8 SHA-256: fb00d5d670fecec456b5569df6a0a607d1c206d8854699ed842ee11c7f91a1bc
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a worksheet and the malicious URL itself. The presence of a link farm heuristic suggests an attempt to distribute malicious content through numerous links. The primary attack pattern involves luring users to a malicious site via a deceptive document.

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=prepositions+and+prepositional+phrases+worksheet+4th+grade
    • http://pasodapo.rautiaguitars.net/uploads/1/3/1/8/131856158/zozarosomud-nulafumej-gevubidunagofuw.pdf
    • http://files.ultimatesourceoflove.com/uploads/1/3/0/7/130739778/gavamafapamapi.pdf
    • http://rofowu.vjcompu.com/uploads/1/3/0/9/130969656/2994931.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/63396149954.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/helicobacter_pylori_tratamiento_dieta.pdf
    • https://cdn.shopify.com/s/files/1/0439/6626/7550/files/all_i_know_big_sean_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/49797514025.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/stormwrack_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/petosefurulujex.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/94039782456.pdf
    • https://cdn.shopify.com/s/files/1/0434/0177/3212/files/niragedupuserivibi.pdf
    • https://cdn.shopify.com/s/files/1/0444/3960/1318/files/diwojebeme.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/52975337394.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/78863795908.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0437/2994/4730/files/how_to_change_into_word_doc_on_mac.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_off00004b21.bin
c6fe27b2b86a58382613651bd87164d46cf5975ed8bd9e7b1313cbf032174cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B21 5464 bytes
font_01_sfnt_off00005dc2.bin
603ee65cd487e461054b7d021fb042cedc1889a7f50d8892495f4c1d893c4bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC2 9844 bytes

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