Malicious PDF — malware analysis report

Static analysis result for SHA-256 7604c91f99df461e…

MALICIOUS

PDF

49.2 KB Created: 2020-08-15 01:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f605b58474cfd5388ebb79ef9a985e3a SHA-1: a4f54044b862b1b919448c1a3d0f94609fab8e9c SHA-256: 7604c91f99df461e6eaedb02f047647efc86ee00a30d1e4da69c25da8c6814cc
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.com/pify?keyword=caffeine+mac++chip' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links, many pointing to shopify domains, suggesting a tactic to disguise malicious links among seemingly benign ones. The primary intent appears to be luring users to malicious sites via these links.

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.com/pify?keyword=caffeine+mac++chip
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdf
    • http://ragozum.endofbelief.org/uploads/1/3/0/8/130813115/2a161b0ab603.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/advanced_accounting_hamlen_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0448/3258/7936/files/gusolawunizokegige.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/46860026440.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/47974590592.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/mirix.pdf
    • https://cdn.shopify.com/s/files/1/0436/1483/0749/files/excel_date_format_yyyymmdd.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/bedewovukimeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/exercises_for_back_and_neck_pain.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/online_form_maker.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/63480147661.pdf
    • https://cdn.shopify.com/s/files/1/0446/9784/5913/files/apache_poi_reader.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/23803702718.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/87552502377.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/historia_de_diabetes_mellitus.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_off000062e9.bin
bd7751498dcff0a9100e568043c6735d767d20fd82a2e226959e83b01edcd58c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 4852 bytes
font_01_sfnt_off00007343.bin
8f975339b459504cb20fc53bfa1c4e00424519d0740b94d0595759d787806536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 2096 bytes
font_02_sfnt_off00007cfa.bin
ba173dc8c2c34ab26b93dce77b9d4e18eb6c29e86c2594b05f282e485d744718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFA 10468 bytes
font_03_sfnt_off0000a10f.bin
4726b306501411345a5720f027af28203c62169135b8afe8381c8e8180782bcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA10F 16692 bytes

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