Malicious PDF — malware analysis report

Static analysis result for SHA-256 154269c79ba9180f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-21 07:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35ace727aa385d0b20f34790ccdb1b52 SHA-1: 8b0702f1e2124e5de7205482a62960d3618948c9 SHA-256: 154269c79ba9180f2e7f0e8ff54327625714bc70c21adad44c149e0c6f70d5dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Cheerleader uniform sims 4 cc' and the malicious URL. The presence of numerous Shopify links, while many are benign, suggests an attempt to blend malicious links with legitimate ones.

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=cheerleader+uniform+sims+4+cc
    • http://files.pigmentsauvage.com/uploads/1/3/0/7/130739971/6514867.pdf
    • http://files.cadellcabins.com/uploads/1/3/1/4/131407102/manuwepe-melosanadatipuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/facolt_di_scienze_della_formazione_bergamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/surah_baqarah_english_transliteration.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/php_random_password_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/winenojemafefetekidedovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/1517386581.pdf
    • https://cdn.shopify.com/s/files/1/0437/1746/0120/files/73934592510.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2045/files/ladigiresubaxanelireles.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/64656099921.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7647/files/31135738899.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0099/files/european_cystic_fibrosis_treatment_guidelines.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042f4.bin
e531b3d74c64aba57e6897906dafc331078d3225b5cc8f63b5dccc4ef937df63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F4 5252 bytes
font_01_sfnt_off00005499.bin
e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5499 2044 bytes
font_02_sfnt_off00005e06.bin
4292831ab4e2c07c41c0c36dee47fd79c3cc45411e384328e0ffe6623dad3f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E06 10280 bytes
font_03_sfnt_off000080f8.bin
ec3b80cafd30aafddb67907ca1bc44ccb28a09407c04222e74a2f658fa9118f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F8 16320 bytes

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