Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b06ef2e4da97e4…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 11:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b891abf9d95b3adf9ce8865ea8ff1b62 SHA-1: 9605aa2e486f5294ee6510fbfa2f3c1ec2aa496e SHA-256: c5b06ef2e4da97e4dd11c8a3f018875f2671bcad1d200ba6b479d2f99403fbb8
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Nokia n8 asphalt 6 game free', suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The PDF also hosts a large number of links to other PDFs, potentially for SEO manipulation or to spread malicious content across multiple domains.

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.cc/pify?keyword=nokia+n8+asphalt+6+game+free
    • http://zarufenu.debbiesangelsproductions.com/uploads/1/3/1/4/131453206/7729057.pdf
    • http://tokazape.webfirethemes.com/uploads/1/3/1/1/131164250/677d34aa.pdf
    • http://files.anrs.ca/uploads/1/3/0/7/130739340/lavevosorudipilix.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/boragomikede.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/14677365721.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/99821648032.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3224/files/91148221939.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/76347267286.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2529/files/arduino_micro_pro_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/lezubaminewageji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/bollywood_background_music_ringtones_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/3694148904.pdf
    • https://cdn.shopify.com/s/files/1/0448/7512/0807/files/basic_gmp_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/26495656550.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/88845604986.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/tulapiduretivimafadozub.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_off000062b7.bin
a56d773344a2dbc3aeb254510dd819e97fc2d1fe97ff3837724d873477198fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 5696 bytes
font_01_sfnt_off000075f4.bin
7b235fb8fb0a8759e63872bad2c3450b7b0e74a2acfe47b3fe5417b665f93eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 10360 bytes

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