Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8337a7d61131f77…

MALICIOUS

PDF

34.7 KB Created: 2020-08-20 02:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ead913252c3bc794e02c9667b9aa4742 SHA-1: 7ccbac44b391657bc052c19b845dc5cee84c59b3 SHA-256: c8337a7d61131f779476381bc874d9af9bd7d640cde9721bbfc0ee8482e1a201
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com'. This heuristic, combined with the ML classifier flagging the document as malicious, strongly suggests an attempt to direct the user to a harmful site. The document body, though heavily obfuscated, contains the same URL, reinforcing this finding. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=nyc+comptroller+annual+report
    • http://xesaniro.guildscc.org/uploads/1/3/0/8/130813117/sesogavujaf.pdf
    • http://jijaboj.mcfieldassociates.com/uploads/1/3/0/7/130738970/4361059.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/amoeba_sisters_video_recap_biomolecules_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/14616379585.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/45449891113.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/dispute_debt_collector_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/equipe_scale.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/60840539411.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bed.bin
4008c5158580902c10cae80e7d33725511b98427f12ea7473351e952d039454d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BED 4972 bytes
font_01_sfnt_off00005cc5.bin
70a96306aecf908505b15256e4c8f3cdb047548d6e976b450bf2231cf4ed1e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC5 9876 bytes

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