Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae11e3a9bf2f6eee…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 13:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eff1ca7df98aca6e761e6615afd6f10e SHA-1: 10fd1963446af73d3376f2d03664ea3536e4848b SHA-256: ae11e3a9bf2f6eee77b0b9d9d0cba9878a8233e790d297f517e25bd06425b027
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a Juniper switch configuration guide. This redirector likely leads to further malicious content or exploits. The document also functions as a link farm, embedding numerous links to PDFs hosted on Shopify, with one specific link identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=juniper+2200+switch+configuration+guide
    • http://fejidon.uulivinglegacy.org/uploads/1/3/1/3/131398140/zozewisififu_wolog_vujubofuzipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/sisexesevebevojegese.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/bipokakovoda.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/excel_footer_sheet_number.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4629/files/4th_edition_d_d.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/15482251994.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/the_divide_2011.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/jizum.pdf
    • https://cdn.shopify.com/s/files/1/0440/9003/2278/files/larik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/dakota_county_property_tax_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/bin_sachivalay_syllabus_2020_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/bojezuberesudofumob.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/vawegi.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_off00005e28.bin
3ab1a8dc3dc8e8d7d1b7c91572e743236a26efc29d77be176e225a6cab75082a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E28 5740 bytes
font_01_sfnt_off000071bb.bin
26611f910a3f944589ca6bf39be9ebfa7b5e514d0feae00d383f50e3ac6b7efe
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BB 12960 bytes