Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ad462c5bbea592…

MALICIOUS

PDF

54.8 KB Created: 2020-08-22 12:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b269295be9aeb455dafba59c900a5a48 SHA-1: 050327976b60d3a7e229495c06773080c0de7ee1 SHA-256: 19ad462c5bbea592a430fe2be7b7407856059aabb80d7d09b7b936538cb2fef7
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, masquerading as a game guide. One of the primary links leads to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm and redirector suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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=cattails+game+guide
    • http://lujul.ayusewingproject.org/uploads/1/3/1/3/131397970/2440980.pdf
    • http://jakutazij.sanctuaryatwoodville.org/uploads/1/3/2/7/132710592/9920b.pdf
    • http://dudeja.mainesouthmusicboosters.org/uploads/1/3/1/3/131380828/panebepiwitizik.pdf
    • http://files.ashfordny.org/uploads/1/3/1/3/131378993/bovuwoledarukojosiku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/adobe_acrobat_editing_software.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/lesojesunegajeradu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/zitabijisaderodud.pdf
    • https://cdn.shopify.com/s/files/1/0433/5268/6742/files/physical_geography_laboratory_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/fur_elise_guitar_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/gemekafovutixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/rodetaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5993/7434/files/sufavekutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/lutusavikofimifime.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/8732982754.pdf
    • https://cdn.shopify.com/s/files/1/0440/5752/6437/files/axelos_msp.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/about_myself_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6773/files/reasoning_ability_questions_and_answers_with_explanation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e60.bin
07c60e88bef720e18948d59136206a040a68ffea005ab7ecaa9a73e96f53c035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 4952 bytes
font_01_sfnt_off00008f22.bin
e7298b00894bc2fc1815a0da7399fba95f7495ede51452b3fc1f599e5ec109e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F22 12860 bytes
font_02_sfnt_off0000b85c.bin
5ae67c8435f95fe8f97e189614720ff276b8bb49ed22e08e82763308cb0f800b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB85C 16300 bytes

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