Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e56796bd76310f…

MALICIOUS

PDF

46.4 KB Created: 2020-09-18 06:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c29a25e8da81568211843a1f42b1e95e SHA-1: eab695ef19e35606c3bcd2a8b28fccc6db63f825 SHA-256: 00e56796bd76310fd4aa49d104aaa7985c40300df7cff315cf978fc674bb3240
192 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.cc' with a query for 'office 2007 keys'. The presence of a "Visual download / call-to-action button lure" heuristic further supports the phishing pretext. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=office+2007+keys In PDF document text
    • http://wasaxop.chardonnayhoa.com/uploads/1/3/1/4/131438640/tasuviwel_terukonukiva_sururo_rimopeve.pdfIn PDF document text
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.pdfIn PDF document text
    • http://gikoxup.littlecharliesbakeshop.com/uploads/1/3/1/4/131438245/dibenekuju_solabelimokunen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5d8fbc68-6be9-44ca-84ce-bc09c37ae72d.filesusr.com/ugd/314c35_b23242ba913c449c9763803b3c68aac9.pdf?index=trueIn PDF document text
    • https://3eb1b4c0-f693-4278-86a5-5a221dfa115b.filesusr.com/ugd/1decf9_6b989dd731e044f398762bf57524d6a7.pdf?index=trueIn PDF document text
    • https://32dad5d5-d0f3-4db0-8d09-203847dc3fd1.filesusr.com/ugd/682d1c_44c055d5481649879e40037c24cf6aee.pdf?index=trueIn PDF document text
    • https://1bc073f8-97f5-4524-9d9c-bc4988cd3613.filesusr.com/ugd/370021_ddc64c515f5d4228b3081a2ee9074e2a.pdf?index=trueIn PDF document text
    • https://b1d1edcf-b62c-4672-9b62-dcd1b7a9e4b9.filesusr.com/ugd/a51aec_f5db58d53a7649e8adfc0999ee3d9877.pdf?index=trueIn PDF document text
    • https://e848ccdd-10f4-4308-83e1-115915ccc32d.filesusr.com/ugd/370ea2_9c5831a1b4064f0fbde81fc8a2ee5e5a.pdf?index=trueIn PDF document text
    • https://16c537cd-716c-49a8-982a-61ea79028f03.filesusr.com/ugd/3f0e57_f4e96f2117cb457e9223f4ec72575f37.pdf?index=trueIn PDF document text
    • https://6bb88ac5-f0fc-433a-b48a-de68dcc3b85e.filesusr.com/ugd/df7b34_ab9ea48285e14ab1a492046c9fdb853a.pdf?index=trueIn PDF document text
    • https://91820f9e-188e-48d6-9b6a-110959cadb90.filesusr.com/ugd/3225da_d590f3e8a4df49f3ac26833d49237838.pdf?index=trueIn PDF document text
    • https://77b47e88-caec-4403-b553-0e115f20eea5.filesusr.com/ugd/53c654_b030fb9744d94daba7908e4917d40e94.pdf?index=trueIn PDF document text
    • https://fbd91652-d146-4c78-a55b-545eb8ab3194.filesusr.com/ugd/0182ef_917aae63b2564e7d887c89a853afe590.pdf?index=trueIn PDF document text
    • https://d283461a-76e3-4128-9528-73c3caba836d.filesusr.com/ugd/4479ed_09e89f5c96394028bc52bf3da6078938.pdf?index=trueIn PDF document text
    • https://7e69f6c5-3481-41d5-a630-2e1201b4a343.filesusr.com/ugd/d94ae5_643aee2cff294cab9d84f9018e367074.pdf?index=trueIn PDF document text
    • https://fe9a3472-df54-4878-97b8-7cce1b8d35e4.filesusr.com/ugd/1c44ce_10a543a5e7d04d2db95acf6095932700.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 4576 bytes
SHA-256: be44e6f1993b00c79650de29fe512c96def6b4a8808e2ec39c11d6c8f2e2dae2
font_01_sfnt_off00007918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 10664 bytes
SHA-256: 2cd19d2e96b31e75a8a9b2a853581091c27c5d15d95e1ba27430b004a6bba748
font_02_sfnt_off00009d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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