Malicious PDF — malware analysis report

Static analysis result for SHA-256 843f9306653f02b1…

MALICIOUS

PDF

152.3 KB Created: 2020-07-29 15:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bd72ae2a6b85330e308d3d24c9e5b0a SHA-1: 6a1a1571fafc40b04741f9f0daad33b29feea05e SHA-256: 843f9306653f02b105ab7c9fa1a33b9b806ad185ff052bc674b37b913dc6419d
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to an 'antimicrobial resistance review pdf'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing the user to a malicious URL, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=antimicrobial+resistance+review+pdf
    • http://files.hirneisenhighflyers.com/uploads/1/3/0/7/130775432/4bf2a2.pdf
    • http://files.stfranciscentre.net/uploads/1/3/1/1/131164351/0e7da.pdf
    • http://files.trillastable.com/uploads/1/3/1/4/131406211/bisufid.pdf
    • http://files.adventuresinfaith.us/uploads/1/3/1/4/131437513/tudowenute_vijerasokesi_jodisopis.pdf
    • http://files.hilltoppreschool.org/uploads/1/3/0/7/130775252/7ed8132dbfb498b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/gojerix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/kaxubinujoli.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/83891757620.pdf
    • https://cdn.shopify.com/s/files/1/0436/4461/6864/files/74327449265.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/87203991997.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/dutawiwunalisemabojujer.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/ragetuxuruvivikalibevapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/gonuriwodilavaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/sebaxegitam.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/gevunopafij.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_off00020647.bin
4624bfb67763e06e6edddb512639355a9af589bff19829a2462a086529c14bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20647 5372 bytes
font_01_sfnt_off0002186e.bin
de4dc0e3a717582ba0deaa2b7d094e3debad4d41267fc1effca4610fd1ea4f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2186E 10752 bytes
font_02_sfnt_off00023d63.bin
43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D63 16148 bytes

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