Malicious PDF — malware analysis report

Static analysis result for SHA-256 800253f4f18779c7…

MALICIOUS

PDF

31.4 KB Created: 2020-08-03 08:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a75de0daefb685e502f51bf9df6adb2 SHA-1: 4af36be84ec5c6ddb287adf1f9d20980ce3bcf7e SHA-256: 800253f4f18779c76201b539e8d8a4ca1e73effc2b907b0cfaba7d6b85908c32
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a large number of embedded links, characteristic of a link farm or SEO spam campaign. One of the primary links directs to a known malicious redirector. The document body contains garbled text and embedded URLs, further supporting the malicious intent. No scripts were extracted from this sample.

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=accuweather+newark+nj
    • http://files.technologyisforeverybody.com/uploads/1/3/1/4/131453432/323698.pdf
    • http://files.morrisseywellness.com/uploads/1/3/1/4/131452922/gakuw.pdf
    • http://files.asampoh.com/uploads/1/3/1/6/131636678/gotem.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/rigonadimarokora.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/bupabiburizugejumiseli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0434/7618/9346/files/lowes_bloomfield_ct.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/gejora.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/nidab.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/modurujisirefozuno.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/saxisesodolanadajetimixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/84955814168.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/how_to_save_finale_file_as.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_off00004211.bin
460bc822f67c58bd4c0e7f38831b43a356221d3e444d4401669b93ea49dbdbe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4211 4896 bytes
font_01_sfnt_off000052c9.bin
3633a759bfed6512dfacc28bbdd14ca9582fe60c466d0fac5b2cb641517bd42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C9 8912 bytes

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