Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a23fa057816758…

MALICIOUS

PDF

35.8 KB Created: 2020-09-19 07:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 509711f4a47dd079c155be82ab080340 SHA-1: d77014ee33b62ad5943cfbe2ed684689434fc029 SHA-256: 22a23fa057816758e9c55ac186a6cfe457a9d61a5fdeadbd708c5e3235cd7d7a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files. One critical heuristic indicates a malicious redirector link, and another identifies a link farm likely used for SEO manipulation or to distribute further malicious content. The document body contains obfuscated text and a URL that appears to be part of the link farm.

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.club/wix?keyword=teak+lectern+osrs
    • http://fepuwijo.auroramay.ca/uploads/1/3/1/3/131379685/117c8b97.pdf
    • http://files.kristindahlhomeloans.com/uploads/1/3/2/6/132695668/ziwituwesuxofiruf.pdf
    • http://mimup.bankslaneinfants.org.uk/uploads/1/3/2/6/132695629/doragidobu_lumosusawabe_fugolelunazono.pdf
    • http://files.dramaaroundtheglobe.com/uploads/1/3/0/9/130969761/4681863.pdf
    • http://xejuxad.renwickpark.com/uploads/1/3/1/3/131379070/vibagigudorisukumere.pdf
    • http://files.living-practically.com/uploads/1/3/1/4/131406344/40b4b758f273.pdf
    • http://files.lakeforestcondoassn.com/uploads/1/3/0/9/130969980/zizudefat.pdf
    • http://fexano.belliesandbundle.com/uploads/1/3/1/4/131453247/3899347.pdf
    • http://files.mjratts.com/uploads/1/3/1/6/131636833/8551689.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/1471904272.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/jetufik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/siwamejupamit.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/google_analytics_academy.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/rocket_propulsion_book.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_off00004f5a.bin
818879a7dc7403ce507a0e22b6d62303ccef4bccb711ab1002c49da143620306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5A 4808 bytes
font_01_sfnt_off00005fbe.bin
7792d5b1ecbc7331abe0cece20123f0679c4b15e7da99f084219539f8fad53d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 10244 bytes

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