Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2bb22d12642a17…

MALICIOUS

PDF

50.8 KB Created: 2020-08-06 04:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f538376b3b274cb84f35ddb372c6e26 SHA-1: c8451b56589a23de50091e2fd9ed0cc9eb2622d0 SHA-256: 7a2bb22d12642a173dbb1bd37390b226eb7a30a08106c70fb114567eea92fbe6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a primary malicious redirector at 'https://ttraff.com/pify?keyword=rig+veda+in+bengali+pdf+free+download'. This suggests the document is part of an SEO spam or phishing campaign designed to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=rig+veda+in+bengali+pdf+free+download
    • http://files.gogrowgratiot.org/uploads/1/3/0/7/130775556/9007545.pdf
    • http://files.tuftslaw.net/uploads/1/3/0/7/130739169/c320ce5fab062a.pdf
    • http://files.honorflightkc.org/uploads/1/3/2/6/132696063/9112954.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/33256493162.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/bible_faith_study_course.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/jazifewenuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/10436689941.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/21163273069.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/xozatenagebawew.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9247/files/forifujitizekomuzi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/24725169797.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/mcse_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/11909663214.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/49196327091.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/46117408470.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_off00006997.bin
ad42b9924daf0746a1a1a6cfb356998806e1d19dcf4796c7accd5e294c464f47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6997 5332 bytes
font_01_sfnt_off00007be4.bin
df05ec9a6dd672c30ecd9d6dd7bbe0f5d2b1fef119057f58d4d9eae0ddea2047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE4 10256 bytes
font_02_sfnt_off00009f10.bin
eabf42ce99efd0081cde7ed7696461cefef3c8ce2fca6aebe9b84f379faf4335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F10 9632 bytes

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