Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3646e6c4dc9613…

MALICIOUS

PDF

163.4 KB Created: 2020-08-07 01:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801098a634df5e8b2d378e9389cebee4 SHA-1: e85c516489842d22c359e2d2dbe884d46a62a380 SHA-256: 0d3646e6c4dc9613fefaad165dda15ddd5382662ed144b18412a4edee6f557a2
134 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body and heuristics strongly suggest an advance-fee scam lure, aiming to trick users into clicking the malicious URL. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/pify?keyword=introduction+to+medical+virology+pdf
    • http://raruje.chriscruzboone.com/uploads/1/3/1/0/131070374/6774982.pdf
    • http://files.yenzfacepainting.com/uploads/1/3/1/3/131398221/a794b1c0a85.pdf
    • http://files.abrasax.info/uploads/1/3/0/7/130776485/zukavujejonovod.pdf
    • http://files.made-by-nature.be/uploads/1/3/1/0/131070434/034cd7e84fcdaf7.pdf
    • http://files.mansoonkim.com/uploads/1/3/1/3/131379320/3726697.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/97021950595.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/dosogaxutedizikago.pdf
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/surujopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3415/files/7081301487.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/fajakekazekobatemaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/5721/7693/files/gedibutibapoloda.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/sefibozim.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/94482878871.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/zufodusavezibedu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/39701949144.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_off000231ae.bin
823dd6485b467a301f73ab2a1f97e221c634203a502fb9a7aa46c39eeab9898f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x231AE 5280 bytes
font_01_sfnt_off00024391.bin
ba301933faaabd33f0a0ee43622fc25d38a2ad5161060c2a3326902a1a4c47bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24391 14752 bytes
font_02_sfnt_off000271e9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x271E9 4324 bytes

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