Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f8503578c1b9a7…

MALICIOUS

PDF

44.4 KB Created: 2020-08-13 00:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b058d51c196b518d539ecd16f11546b5 SHA-1: 3324e3514c137db856a44bed98e3bbee0e0fe890 SHA-256: 20f8503578c1b9a7a773873803c904eb276838fc3ffe477d39ee237e8a3c775e
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body also contains a call-to-action phrase and numerous embedded URLs, many of which are hosted on Shopify and appear to be part of a link farm designed to improve SEO for malicious content. The primary malicious URL is a redirector that likely leads to further malicious content or malware download.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=branding+plan+template+pdf
    • http://files.newportplaza-tenant.com/uploads/1/3/1/4/131453522/fuvalexexu.pdf
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • http://files.amitycart.com/uploads/1/3/1/1/131163635/dibibibosasexevomew.pdf
    • http://files.brett-andreas-portfolio.com/uploads/1/3/0/8/130874539/1778409.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/d_d_cityscape.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/bubod.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/28270967782.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/warhammer_apocrypha_now.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/rixet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/nuratoronogosifonobokiso.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/99_red_balloons_lyrics_german.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/gobipuvuxadewefuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2284/3036/files/64468797216.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_off0000718d.bin
8a7492484903302bd687913d06f84d6458951204e79eeb112c86bcc1f8d371fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718D 5232 bytes
font_01_sfnt_off00008343.bin
c79e977f18b70e0858f10f11bfa507945dd58e5b75597cb51581ba340e964254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 10000 bytes

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