Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d732f8347edf92…

MALICIOUS

PDF

105.1 KB Created: 2020-08-11 00:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc581860daeac8800801b987caa8042 SHA-1: 770e0c2e5a1fb09eb0603ab16d76849768a3c01e SHA-256: e7d732f8347edf923c828f16a8a1971856d954ce9e79fe84b4fc2898f5d11b7a
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to manipulate search engine results. One of the embedded links, 'https://ttraff.com/pify?keyword=apoptotic+factors+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect the user to a malicious site.

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=apoptotic+factors+pdf
    • http://files.billmohrart.com/uploads/1/3/1/6/131606745/pudaj.pdf
    • http://files.susanmateuglass.com/uploads/1/3/0/7/130738894/fonufogexotakiw.pdf
    • http://files.cafeokawari.com/uploads/1/3/1/3/131384663/vifaf_lalaxel_dokimot_dulavemefolinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/kazine.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/nenuzojowowiwulumuguxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/rebecca_bloch_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/tenovabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/22328834365.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/gold_gym_resistance_band.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/nilagekaxojaganizijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/91518080114.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/banelarowitimiwowamapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/35825761920.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5069/files/1585368481.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/jakirizanof.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_off00015bbd.bin
d4a7a0fe8f34ec87ea9e4a31cf598e963ad41869925cf1aa89faa786d174af2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBD 5104 bytes
font_01_sfnt_off00016d1c.bin
7c5ece6431fd42d73d56533091fbdb22abfb29c2a7179b888b01f38dd1a7c0b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D1C 12476 bytes

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