Malicious PDF — malware analysis report

Static analysis result for SHA-256 02dbe28d8767bed8…

MALICIOUS

PDF

53.8 KB Created: 2020-08-14 22:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef412f091436850e9b3b7fa22ddf8d95 SHA-1: 2f252e497a1f3ad48eede57ec6fd65e654d8feec SHA-256: 02dbe28d8767bed809a53f2dec00096749e07e43f0e2b870c2ac4d7c38d26ba5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to direct users to harmful content. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=acceptance+in+addiction+recovery+worksheets
    • http://files.abdg.info/uploads/1/3/0/7/130775109/fabixov-mapiso-xapiwuk-zanew.pdf
    • http://files.playsport-usa.com/uploads/1/3/1/0/131069789/gorixaloxilemajanuge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/aneurisma_de_aorta_abdominal_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/fobadozase.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/flint_and_tinder_wow_classic.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/business_analytics_dinesh_kumar_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/fituxobulevupiviz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/47250631543.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/14012537504.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ketotojugidumirazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/virikisonupari.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/inactive_ingredient_database.pdf
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/invite_to_second_consultation_meeting_template.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000873c.bin
515c7cb47b0f37f78f1d06b0b620688c946d428a7504fb5017adf91e23cc4a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 5224 bytes
font_01_sfnt_off00009902.bin
155ecdfabfb7c9906a6ab9558e047f253622eb04e896d018ee8604758378a198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9902 10204 bytes
font_02_sfnt_off0000bbd8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD8 4324 bytes

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