Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43b124c7ae4e714…

MALICIOUS

PDF

50.3 KB Created: 2020-09-17 11:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09b4bfc7f04e99ad603521273bff806 SHA-1: 591995b033fc69f6537024ee010e6033f37e16af SHA-256: c43b124c7ae4e71479b4737884236b88350c86c48b659e0daf92de68c411f07c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and being part of a link farm. The embedded document body text, though partially corrupted, contains URLs that are consistent with this finding. The primary malicious URL identified is https://ttraff.link/wix?keyword=country+instrumental+music, which is likely used to redirect the user to a malicious site. The presence of numerous other PDF links suggests a tactic to broaden the attack surface or manipulate search results.

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.link/wix?keyword=country+instrumental+music
    • http://files.clairedaviselite.com/uploads/1/3/1/6/131637136/b72c8.pdf
    • http://togixav.theparishofstaugustine.com/uploads/1/3/1/4/131454536/bozevazeluju.pdf
    • http://zamematir.tintawitaelderliving.com/uploads/1/3/0/8/130874038/8938673.pdf
    • http://files.thenavigatorprogram.org/uploads/1/3/2/6/132682210/vebil.pdf
    • https://669d880b-30a3-4a38-ab24-bba428484d3e.filesusr.com/ugd/909b15_62af082606504a4eb34c716ea9c79427.pdf?index=true
    • https://7d90ccef-495d-4fa0-bbee-bc0998886438.filesusr.com/ugd/35ddae_98459e30f27748f48c62dae712b3efc0.pdf?index=true
    • https://51419ba3-ecb7-4270-bee2-b999032cb10d.filesusr.com/ugd/99afdc_5ebd4bcf0c754bff9a09741999b23e33.pdf?index=true
    • https://a3cd3032-a24b-4f5b-ad52-6b9952cc38ef.filesusr.com/ugd/83f04e_a562527d10db4f25abdb311cc197a6c0.pdf?index=true
    • https://8998b80d-81bd-4c45-a365-2f2c81662b4d.filesusr.com/ugd/8127dd_0aa2d5330c6842f6b60fc7457c4669d9.pdf?index=true
    • https://dcc80b4f-1d37-440f-bef5-810f55636975.filesusr.com/ugd/229b11_8b81bc748f8e467e8d85eaf0eac750ee.pdf?index=true
    • https://800b5d52-9965-46c5-9510-6b5dff9b50a8.filesusr.com/ugd/2c76f4_ded738ca3ba64420b5a47060f57d13a6.pdf?index=true
    • https://4fe03e5b-e90f-4555-b9cf-f99ea229537c.filesusr.com/ugd/89441e_01cfe9cd896c4e7d9aea18d6a2f5e04f.pdf?index=true
    • https://68c59d06-f032-42dd-a9f4-0d7667951c53.filesusr.com/ugd/f3bfbb_b8f08acc1c7341d695bd4e1903df28da.pdf?index=true
    • https://b241bdc8-428c-440c-b3f7-5700bc6ee343.filesusr.com/ugd/8e1900_9e6518a4ae904e56b027b0403b857631.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a32.bin
a54fad654bb6a70a6cdaf1fc29a602ab36f15bf0fd898057708c5187cf61b70c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A32 4952 bytes
font_01_sfnt_off00008af5.bin
6aafbdc6e9fafac02b26b6682401f6f255a613448e29f5319ca0cb999ea1c06d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF5 10376 bytes
font_02_sfnt_off0000ae7e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7E 4324 bytes

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