Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc57dbab483bafee…

MALICIOUS

PDF

40.2 KB Created: 2020-08-26 09:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ca70934aeb773a4f7164630c92251c SHA-1: b73bc1aee317d73b5fe7a35dc7352cf50a6421c1 SHA-256: cc57dbab483bafeedb6728852ac342b08d66df81ca8d7456b3baae3712a893fb
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=english+alphabet+tracing+pdf. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous links, many pointing to Shopify domains, indicates a link farm or SEO poisoning tactic to distribute malicious content.

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=english+alphabet+tracing+pdf
    • http://files.jannamparker.com/uploads/1/3/2/6/132681602/mufasozozado_pikilixumovi_jojetizurup_dopiragowaduv.pdf
    • http://files.doorwaytodignityabuserecovery.com/uploads/1/3/1/4/131438474/kenope_babuwupukiw.pdf
    • http://baxugibeb.artnitetexas.com/uploads/1/3/2/6/132696030/2179163.pdf
    • http://files.advancedagseed.com/uploads/1/3/0/8/130874652/3229483.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/bailando_enrique_iglesias_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/68119719752.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/muwifezogatimizasuriroze.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/ap_chemistry_chapter_10_gases_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/redanifexizavoliwawig.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/meterpreter_android_screenshot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7572/files/nudub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/huckleberry_finn_literary_analysis_essay.pdf
    • https://cdn.shopify.com/s/files/1/0428/8335/0687/files/vejopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/solving_literal_equations_coloring_activity_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/fonegatobodegobeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/kodefomipodapige.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_off000051e8.bin
765f21ebb89330079d0c884f42a1c42c36416c92c6255c38626aa75ae9b70b9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E8 5192 bytes
font_01_sfnt_off00006376.bin
2ca861944433f528ad44a18cfa7f3ca827d4ec8618632ae2530877bdfe22b2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 10104 bytes
font_02_sfnt_off00008602.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 4324 bytes

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