Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1467379a832e79…

MALICIOUS

PDF

60.1 KB Created: 2020-08-24 06:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe05387c908ff9cb09fa5cb7c69007c SHA-1: 6cef245f23170df852dec471e5c96ae09e1790f4 SHA-256: 3b1467379a832e79b35d6bea3004fa9568c734be07a8575f0c42ade9128fb557
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=minecraft+1.+14.+4+apk+award`. This URL is presented within the document body, disguised as a download for 'Minecraft 1.14.4 apk award'. The document also contains a mass external PDF link farm, with many links pointing to Shopify domains, but the primary malicious indicator is the redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a malicious redirector suggests the document is designed to lead the user to a harmful destination.

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.cc/pify?keyword=minecraft+1.+14.+4+apk+award
    • http://susiveli.meridianbodycare.com/uploads/1/3/1/6/131637354/65863.pdf
    • http://borumap.viana-motion.com/uploads/1/3/2/6/132683138/livupurikub.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/sefugifixowaxediwamapezev.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/xawifoxuzubijaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/four_basic_language_skills.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/the_seven_value_stream_mapping_tools.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/lasasovobalafozeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2855/3634/files/toxata.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/leg_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/41868497266.pdf
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/sketch_website_mockup_template.pdf
    • https://cdn.shopify.com/s/files/1/0461/6676/9827/files/73501242924.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/56590234951.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009415.bin
a654a304cdbd9970e9b683c631ec6bedc7d891f5cbc22d08bdc422bde0ce3ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9415 3192 bytes
font_01_sfnt_off00009f85.bin
bc800e86a1c4873b250fb9cd0ecc25340ac93e7156256df9e37e82c1e99e5e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F85 4952 bytes
font_02_sfnt_off0000b081.bin
f51186d7730949e7c30893f54ad6b4b9b1936c120cf2d606a6b7894419803b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB081 10668 bytes
font_03_sfnt_off0000d4ee.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EE 4324 bytes

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