Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d423e4a6078ab7c…

MALICIOUS

PDF

35.4 KB Created: 2020-09-17 11:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29d9c823150cbe5c93981e227919d69a SHA-1: ee74dba0c3739989e042ecf177a7182d30c0fecd SHA-256: 7d423e4a6078ab7cd946670d967ade8bbba6efd4585b73c7433dc4f5c38c454b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a redirector to 'https://ttraff.club/wix?keyword=olivet+middle+school+athletics', indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body text, though partially corrupted, contains the same lure text and URLs found in the heuristics, reinforcing the malicious intent. No scripts were extracted from this sample.

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.club/wix?keyword=olivet+middle+school+athletics
    • http://files.kristiepottertherapy.com/uploads/1/3/2/8/132814972/6754e8cd8481f3d.pdf
    • http://vixus.ttmr8.org/uploads/1/3/1/3/131380600/ludakewuwofowi.pdf
    • http://nanidokaw.vietnamcafesandwich.com/uploads/1/3/2/8/132816202/5172210.pdf
    • http://fuwil.soarohio.org/uploads/1/3/0/8/130874113/jabaxosotelibo-mavitudul-volagexijufor.pdf
    • http://babojux.jerseyshorewellness.com/uploads/1/3/0/8/130814328/wajawulivepalok_bixojib_xevuji_xidukebaxob.pdf
    • http://xekeg.carsontidwell.com/uploads/1/3/1/3/131382243/6971329.pdf
    • http://keposiwek.dia-healthcare.com/uploads/1/3/1/0/131071164/kuvinoxez.pdf
    • http://files.impeccableyou.co.uk/uploads/1/3/1/3/131379706/novogunigaw.pdf
    • https://b0d1ca0c-c4de-4df1-b72e-41047e27b4e4.filesusr.com/ugd/d9d1f5_67de4b93cf0a4da4a19054f1b756c8da.pdf?index=true
    • https://2eaa343f-d98e-49cc-8ac6-f99a803a355d.filesusr.com/ugd/158fb9_9ecb1edb9857479c9f468f8c81ec7f8e.pdf?index=true
    • https://6dfc4d78-9c2a-421b-a589-1720a2243142.filesusr.com/ugd/d5415a_79dc4747ad9847ba8506c7f8a4232847.pdf?index=true
    • https://c0c16800-0767-4c12-ab3a-4ab45c0f71fe.filesusr.com/ugd/1c8c1e_a37d73ddb37945bcacb2ba2ab789fa1c.pdf?index=true
    • https://3625e0c1-0bc6-4379-840a-289dfb12b47d.filesusr.com/ugd/6a22cb_69ec2736e28f41ef9141e5defd6ab610.pdf?index=true
    • https://813b05e0-5f5e-4bed-85f6-6b7f3e49b571.filesusr.com/ugd/f515ca_e84aa2c9b7894e1393512f0cc252ec1d.pdf?index=true
    • https://480cf537-462d-4e93-ad36-699f23de72c6.filesusr.com/ugd/4bb894_73ccad43daf241cbba076310df693ac0.pdf?index=true
    • https://f8b3e3f6-ee49-4644-b456-28f20539578b.filesusr.com/ugd/33ab24_6231f8dbe19a403d8c53e27f53444076.pdf?index=true
    • https://6b86eb0d-40a6-4650-ad95-9c06ac74fd8e.filesusr.com/ugd/d216cb_38bb6753f7f84f379de7d504b410fbb5.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d3b.bin
f3eaa65f19dcfd2086d5f4baa02ae3debd781b7d83110f6785a4789189697886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3B 5172 bytes
font_01_sfnt_off00005eb3.bin
521b6ceda4f2bf2a6d5feb63d2ede485259a4027400da5815a86c8ecf51f57f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 10008 bytes

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