Malicious PDF — malware analysis report

Static analysis result for SHA-256 53480d46efc762bc…

MALICIOUS

PDF

36.6 KB Created: 2020-08-05 15:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e7cb85011ac26dfe48688768ab6008 SHA-1: 2dc8c6b39d0a3b948f0121f03e26f0a973d3df1f SHA-256: 53480d46efc762bc72eb250119df5601f5618066a001763cfa053423dac84c7e
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the phrase 'Behold a pale horse pdf download' and the malicious redirector URL. This suggests a social engineering attack aiming to direct users to malicious content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=behold+a+pale+horse+pdf+download
    • http://fozil.aeromechanism.com/uploads/1/3/1/3/131384635/6694653.pdf
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131384635/xamovifixokoxu.pdf
    • http://files.amenfordesign.com/uploads/1/3/0/9/130969967/9901737.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/vupuponuwitagirokiwesan.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/pierre_bourdieu_habitus.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/wigixijipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/35012696905.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/62257109320.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/sukulexekufif.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/republic_commando_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/rails_has_many_through.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/fire_mage_bis.pdf
    • https://cdn.shopify.com/s/files/1/0437/0979/2407/files/zekaxifilosuwemupoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/ff12_zodiac_age_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/katekabosupox.pdf
    • https://archive.org/download/WilliamCooper-beholdAPaleHorse/
    • 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_off000050e4.bin
bab4c305d9e2fb45b6bcd75c5c46b7f6b1c146e03a384cd1f25f3d2e0ee5be67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E4 5268 bytes
font_01_sfnt_off000062dc.bin
71e2c53c062c1b9f0c1da682c4f16d1ca9849f640bd2e7831000d154aeced363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 10024 bytes

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