Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88a606f37e13ea8…

MALICIOUS

PDF

50.6 KB Created: 2020-07-22 01:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e0a3566deaa8f5d0c1773a2c11d5e92 SHA-1: 2a8d8b140186b2cbc0d4d721b26b6a63fa3fcb85 SHA-256: b88a606f37e13ea814256e8b4c8f079675935fb8e41b5c5fd890b4a4e89e57e9
120 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, specifically a redirector link to 'ttraff.cc' and a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. The embedded URL 'https://ttraff.cc/pify?keyword=adjectives+prepositions+pdf' is flagged as a known malicious redirector. The document body is heavily obfuscated and does not provide clear textual clues, but the presence of these links strongly suggests a malicious redirection attempt.

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=adjectives+prepositions+pdf
    • http://files.pianolessonsbyjulie.com/uploads/1/3/1/3/131380868/59baef08.pdf
    • http://files.rialtosports.com/uploads/1/3/0/7/130776182/3700474.pdf
    • http://files.londontowalsingham.com/uploads/1/3/1/3/131384335/rosawure.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/27256900445.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/2257388875.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/fidovodixenosajotaximomud.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/rovezisusasewolevudap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/25210733543.pdf
    • https://kevumex.files.wordpress.com/2020/07/29121733766.pdf
    • https://zarulixapato.files.wordpress.com/2020/07/kabuworugufa.pdf
    • https://nowirew.files.wordpress.com/2020/06/94012705130.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/44822217827.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/wopufabaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/nesesibenebu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/8799586665.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/forob.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/lalafifutudete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.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_off000073a3.bin
7f931e93f3969926fd845755b49a31742c200fa1f622cd0f50db277118543163
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A3 4820 bytes
font_01_sfnt_off0000841c.bin
b16dde1c87d9180474eade0c838762cbe1631bf8553de2e3f72f12689c733aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 10292 bytes
font_02_sfnt_off0000a74d.bin
5da9b0833506f02f921265b7516789bbc66120cc6f3ad146271fb282e05cebaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xA74D 16204 bytes