Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4e501bb5ed8fc0…

MALICIOUS

PDF

46.6 KB Created: 2020-07-29 02:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cebcc5bfa7035e3d1a84b3663d8f0e6f SHA-1: ba05a81cec6b8dc71a0894f6c7009c43a99fc749 SHA-256: fd4e501bb5ed8fc0a7402cf7ed08526ff6e8e13c33e1f0368ff9360d80e5d2f5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also exhibits a PDF link farm heuristic, with numerous links hosted on cdn.shopify.com and other domains, suggesting a broad distribution effort. The presence of a 'download button' lure further supports a social engineering attack. The primary IOC is the redirector URL, which likely leads to a malicious payload.

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.cc/pify?keyword=absent+leave+letter+format
    • http://files.fids-dance.com/uploads/1/3/1/3/131380623/josowusowiladoz_mexose_junof.pdf
    • http://files.discoverdp.info/uploads/1/3/1/3/131384173/8287854.pdf
    • http://files.equipasia.net/uploads/1/3/1/4/131408581/sufegifojas_junebew_jisebovaxu.pdf
    • http://files.drfelixroom26.com/uploads/1/3/1/4/131453543/minubu.pdf
    • http://files.shaynaleecoaching.com/uploads/1/3/0/8/130874691/7c474c332.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/91029329962.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/gomexofutuxekesim.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/69029292951.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/17662958401.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/96830980774.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/pawomowexipajoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/derikijamaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/juwatudimixuruwusafij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/mokozewivijito.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/90902625131.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_off00007aaa.bin
7ff65d5833c00d84768936fcb11f00ad172559a255155387dafe76bdb19c97a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAA 4840 bytes
font_01_sfnt_off00008b02.bin
b042462781fc232cbecdbb488b6f3fd29ef82e089eddab05acb918890093aafa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B02 10016 bytes