Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c2db83e7f669e2…

MALICIOUS

PDF

49.9 KB Created: 2020-09-17 07:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c843459faf41d20b99ae0b9fd7475443 SHA-1: c1556c6955ec2115fa7b2e14fdf2f69cb8369b2b SHA-256: 05c2db83e7f669e299f0da44f92407d48074674529c6fb4be5bfdc7a8284c088
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with the heuristic findings, suggesting a campaign to drive traffic to malicious sites, potentially 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.me/wix?keyword=fear+ward+vanilla+wow
    • http://raxisowe.thevegantravels.com/uploads/1/3/1/1/131164250/nezeselabeforapoz.pdf
    • http://vepuwujil.fatzdomino.com/uploads/1/3/1/4/131482992/21b082.pdf
    • http://files.tasteofhamilton.co/uploads/1/3/2/3/132302924/557158ecabcd2.pdf
    • http://files.selahchurch.com/uploads/1/3/2/8/132814949/takaxud.pdf
    • http://sonoso.brancovfinancial.com/uploads/1/3/1/8/131856160/4353258.pdf
    • http://lemaro.portcitygymnastics.net/uploads/1/3/1/4/131408183/38de19081.pdf
    • http://ridutofag.scholarwanders.com/uploads/1/3/1/4/131452883/duren-visaligobu-bunibifawuwo-gakodegevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://28c844cd-7e5a-4783-9a4e-b8bb526bffc5.filesusr.com/ugd/a2e20a_36a8548b1f46441ea9beb62ba2f9c431.pdf?index=true
    • https://56dd8425-198e-4854-bb57-77bf64406165.filesusr.com/ugd/6116da_7c47d7c124314d288656d313e2946942.pdf?index=true
    • https://58a844be-f511-4719-bf8f-1efa9540ff04.filesusr.com/ugd/26f730_cb04392808fb43b5857302103bf9716a.pdf?index=true
    • https://69e6c722-b221-444c-8b5c-1c9b2c82c333.filesusr.com/ugd/9c66ff_50877c65e39a49ee8c558682de0501f7.pdf?index=true
    • https://dc0771e7-8b40-4051-85df-f4a90e63e256.filesusr.com/ugd/2eedf1_113f7404a64c44aeaec758fb6de4b028.pdf?index=true
    • https://a943ccc9-62df-4099-8f66-86888a8b5d9a.filesusr.com/ugd/df7b34_b003b67b669d4bbca59a0e49cf8ed980.pdf?index=true
    • https://13be0222-c126-4d5c-a57d-291ac527d0c9.filesusr.com/ugd/b7ed05_eba3b78b4a6f4368a0867db502a1ba4e.pdf?index=true
    • https://6955fd1f-3480-4348-a316-5c165b445724.filesusr.com/ugd/e80f4c_79bc2f82d825458b86b1207f360bf3a7.pdf?index=true
    • https://cf4202cd-cac2-40a1-939d-44d9c880e448.filesusr.com/ugd/debdc1_57da8a868629434ea44d5d6085d769e6.pdf?index=true
    • https://05f9ae52-1bdd-4262-aadb-dc09713fefb2.filesusr.com/ugd/8ce377_f3ac5f7f5d7d4314bccdbb164df75c51.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086f2.bin
8da86916058c63aa69bb4857a2d9e96e4858beb63a3dda6e21f803c37aa6574e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F2 4748 bytes
font_01_sfnt_off0000973c.bin
8f1c18f26cf9606640b6899d0c96abeb692f14083e336cf80f344d58a42777cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 10468 bytes

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