Malicious PDF — malware analysis report

Static analysis result for SHA-256 646de397494e9785…

MALICIOUS

PDF

58.5 KB Created: 2020-09-17 08:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010483dba1f38f9794153ebafc43d573 SHA-1: dff11e95f70437876385e2bd605d261754917f8d SHA-256: 646de397494e9785549587bb8de1555ace29f00e9dda818b207d839e418db387
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 a critical heuristic firing indicating it's a redirector link farm. One of the primary links leads to 'ttraff.me', a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the 'pure substance vs mixture worksheet pdf' keyword, suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links further supports the link farm hypothesis.

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=pure+substance+vs+mixture+worksheet+pdf
    • http://gazoberu.grand-boats.co.uk/uploads/1/3/0/8/130813765/vovezozibumatiwu.pdf
    • http://nuxaduw.nybellhouse.com/uploads/1/3/2/7/132710621/filatu.pdf
    • http://jetutu.store.advantageauburn.com/uploads/1/3/0/7/130740522/5457005.pdf
    • http://files.lama-lab.com/uploads/1/3/2/6/132695698/970bdbed5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://26a5903f-f8c4-40d1-a441-c87f5d6c6609.filesusr.com/ugd/54e393_59f2379daced474299ce73a0cded534e.pdf?index=true
    • https://cd3ae886-33b5-451e-8989-7ed3922c1a43.filesusr.com/ugd/e2c223_0874607b626f415c9be9f5e56785344e.pdf?index=true
    • https://e48d9dd0-7304-485d-a9b0-a2336bce3f70.filesusr.com/ugd/c722c2_389480fa82354d25aa75d379c3ece758.pdf?index=true
    • https://9d4365de-6f89-4c72-9986-ba665cc3e689.filesusr.com/ugd/9e41f0_0d6854c1fee54f0c92ba782bf6a61a9a.pdf?index=true
    • https://43277db8-aaf7-4cff-8bd8-45ff0fe14fc9.filesusr.com/ugd/accd1f_779f30a1ab6141a581a282a42cb8e186.pdf?index=true
    • https://c62c6b83-2577-4b3a-ab43-2b15133d835d.filesusr.com/ugd/cf9ff1_91909e48e6b34cb0b494a377c301dafd.pdf?index=true
    • https://154c2848-fda4-4554-9897-5b2054a172bf.filesusr.com/ugd/d6af85_fc13a69092fe43ad9ca1c65305238b4b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6712/1565/files/69690338650.pdf
    • https://cdn.shopify.com/s/files/1/0453/6886/9019/files/pizonoberalazidagukuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/antecedentes_historicos_de_la_administracion_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/sugowitewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/69429206243.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bad.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAD 2828 bytes
font_01_sfnt_off0000a5a8.bin
b186c96b41c74ab269e74008d870fdb9dafd62a14967f03453c4c1f2d155aef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A8 5788 bytes
font_02_sfnt_off0000b944.bin
da05e9d2a7418ae8c3762dbc81d400d7be0641f0312fc1585da3278af5c7d5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB944 9812 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.