Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b2e9832f94fa64…

MALICIOUS

PDF

65.2 KB Created: 2020-08-09 13:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 570923630b96ab742ea487ddc0961d01 SHA-1: 632a320df230eda175087ce9a1b3edc8a4e51786 SHA-256: 85b2e9832f94fa6458a17bf40f3301c247aa28ce7d4d60ffe545d06522bcad25
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=discrete+joint+probability+distribution+pdf', which is likely intended to lead the user to a malicious site. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious 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=discrete+joint+probability+distribution+pdf
    • http://files.nepalpeacehome.org/uploads/1/3/0/7/130739646/wajupok-biwev-dinerixoxorede-nudodaje.pdf
    • http://nezudizif.andyhartsphotography.com/uploads/1/3/1/4/131408027/5baf5e35a9.pdf
    • http://files.wakefieldconcertband.org/uploads/1/3/1/3/131384589/4391416.pdf
    • http://momogepod.tllafleur.com/uploads/1/3/1/0/131070872/e2a8a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/bowelojanejogikepuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/37473884149.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/49788392821.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/28136093745.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/18325249800.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/gokajegukuzuseluvigafaxef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vewurobafug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/33142040442.pdf
    • https://cdn.shopify.com/s/files/1/0441/1952/3480/files/fevoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/52111581193.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/4396684523.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d24.bin
d89778ff56f462e2c37ff31ad43722da4bd4c3c94dcb311f23866a1f8417b70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D24 5464 bytes
font_01_sfnt_off0000afd3.bin
d5ee530bf668a09671b4a89705d550f1049afafb1ae967536c161a60af69c92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD3 15856 bytes
font_02_sfnt_off0000e163.bin
6bb993e87b9852463968c8bb1ab4a1189a2ca4776bc641e7ec3cf47ea4d574f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE163 16268 bytes

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