Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4dc8827a9f9f458…

MALICIOUS

PDF

118.9 KB Created: 2020-08-30 08:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc5a4dd4cf2738c476af302f29fc763 SHA-1: 7bfb55dd31a394d2b120e3b323b584f65faa4b8c SHA-256: a4dc8827a9f9f45892792f89b4ce51c3ec559219bd283a7c90c628814aa73d28
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=hermeneutica+introduccion+biblica+pdf'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to generate traffic or distribute content through numerous external links. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. No scripts were extracted from this sample.

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.ru/wix?keyword=hermeneutica+introduccion+biblica+pdf
    • https://cdn.shopify.com/s/files/1/0437/3004/3041/files/40625310601.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7615/files/saxibubotanex.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/luwamafuxugunanarok.pdf
    • https://static.usrfiles.com/ugd/fb83f1_2e0519c46ac541788b08a503dd674138.pdf
    • https://static.usrfiles.com/ugd/857e61_3457409dbb0d4f70be117221f7225d95.pdf
    • https://static.usrfiles.com/ugd/930050_4b8bbcf98b6543dda34f12b92fbd95f8.pdf
    • https://static.usrfiles.com/ugd/299074_6763cd55be394dcc8dc2f8b1c2994540.pdf
    • https://static.usrfiles.com/ugd/93c935_f667f13238b640e7bf96fbaf168f5f3c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/adventure_time_essential_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0438/7163/3563/files/nerobiwomajakijomobige.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/ct_bng_foxit.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_off0001985c.bin
bc2ff8a6bd69fad60caa92f63c6de4c6d29603170da5d1cdb741e80d25073956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1985C 5224 bytes
font_01_sfnt_off0001a9f8.bin
e2464fd783183ebe34c8874b25b243c097302d5067ebbf9856e3c5f9a2e29585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9F8 10916 bytes

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