Malicious PDF — malware analysis report

Static analysis result for SHA-256 99333cdae4a10520…

MALICIOUS

PDF

38.9 KB Created: 2020-08-24 01:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce02a477765e85e55eb7a17553a34922 SHA-1: 9e112839491cf2e3d866c5b42e2fd60da9e92edf SHA-256: 99333cdae4a10520db6eb6bff7360f93eb0401fafb794eb4215b1e54b712965e
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell

The PDF contains a malicious redirector link disguised as a free Acrobat Reader download. It also features a large number of embedded links, many pointing to Shopify domains, likely for SEO poisoning or to host further payloads. The presence of a visible command execution instruction suggests the document is designed to trigger further malicious activity.

Heuristics 5

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.cc/pify?keyword=acrobat+reader+x+free
    • http://files.17southband.com/uploads/1/3/1/4/131454034/f3822dc.pdf
    • http://files.pwshotokan.com/uploads/1/3/2/3/132302859/pudom-taxulog.pdf
    • http://files.richardellishair.co.uk/uploads/1/3/1/4/131452841/wobipogofiz.pdf
    • http://files.suenospublicationsllc.com/uploads/1/3/1/4/131453684/2436685f.pdf
    • http://guxesaju.unlockministry.org/uploads/1/3/1/6/131606289/lejezoxudekad-bovedumi-mesofakutuju-fopabad.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/90038899456.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/sobigapi.pdf
    • https://cdn.shopify.com/s/files/1/0461/9708/0215/files/kozolunaragotalidavamone.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/bow_making_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/18083382607.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/busased.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/48041202432.pdf
    • https://cdn.shopify.com/s/files/1/0438/8395/4328/files/vozurigagak.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/allan_poe_the_raven.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/dalogikotox.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_off00005bc1.bin
1823522389c905ff70b12c727ec1dc568d84b824aa623876fffc1ece757038d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC1 5000 bytes
font_01_sfnt_off00006cd0.bin
43827a1fe8eba92549b1b1711139b81f96cfc817b065aa82729666861cf00c88
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD0 9968 bytes