Malicious PDF — malware analysis report

Static analysis result for SHA-256 81044732ab42a9fd…

MALICIOUS

PDF

87.6 KB Created: 2020-08-02 09:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff6eced292e68a1b12418e6271b8aab2 SHA-1: c7e0d84f273c04e16da7a0e97b36811f127669b5 SHA-256: 81044732ab42a9fd53466bbdb1bc55b0835baa12eb39d7ca7d1dd29daa5d288b
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=cold+blooded+tinkers'. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to lure the user to this malicious site. The presence of numerous links also suggests an attempt to manipulate search engine results or distribute content broadly.

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.cc/pify?keyword=cold+blooded+tinkers
    • http://files.tbrms.com/uploads/1/3/2/6/132681409/1835539.pdf
    • http://files.204titude.com/uploads/1/3/1/0/131071167/wadimuf.pdf
    • http://files.americanhometex.com/uploads/1/3/0/8/130874197/fozod.pdf
    • http://files.fccharriman.org/uploads/1/3/1/8/131860645/ruxilugivilun-siluvubujezug.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/xovipufovimoxovonugumonul.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/78596951071.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/fios_speed_optimizer.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/sejito.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/kolanubef.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/zuluzovupubimanujadosezip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/25382702399.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/17659810741.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/92170529342.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/wexomojipa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/gitad.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_off00011c9d.bin
b7ade5a645ba73479cfc4bb6d93f0e47a0c11ee69120335b5673810602aedf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9D 4716 bytes
font_01_sfnt_off00012cab.bin
5a86d635467b04cd7d71af7495bc3ee01d22b401b3aacf72a05a0c3d252bd50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAB 10760 bytes

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