Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daffe6801f33374…

MALICIOUS

PDF

38.0 KB Created: 2020-08-17 03:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab1e7cb2fa4f09d13243936cdae92feb SHA-1: bb627362057281d9bdf91833dcaf068d8573f71e SHA-256: 5daffe6801f333746820ce216ea7079bfaf1b600d2f5a8848e364b3eb9b6af19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The primary malicious URL identified is `https://ttraff.com/pify?keyword=photo+background+4k`. The document body, though heavily obfuscated, appears to contain text related to 'Photo background 4k', likely a lure to entice users to click the embedded links.

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=photo+background+4k
    • http://lubazina.epindustries.co.uk/uploads/1/3/2/8/132814930/481bb3ed1b22bc3.pdf
    • http://files.detroitbracelet.com/uploads/1/3/0/8/130874317/5729956.pdf
    • http://files.awanaset.org/uploads/1/3/2/7/132740923/55fb071c63c5d.pdf
    • http://files.richardrundleelementary.com/uploads/1/3/1/4/131437044/7356408.pdf
    • http://files.sarasotacommunitychurch.org/uploads/1/3/1/6/131606003/tulisavuromu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/how_to_upload_files_to_dropbox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/40582403836.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/79452301744.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/zuzuvepuwibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3391/8616/files/xaxivelumin.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/6555160890.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/komob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/79886301803.pdf
    • https://cdn.shopify.com/s/files/1/0438/9135/9899/files/aldehydes_and_ketones_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/vitolunakexumuwozafal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/24256056324.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/comment_faire_l_adoration_du_saint_sacrement.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_off00004ff2.bin
5f6533edee3a86fe8ccadeceb3fac9dfbce657ca4623f3fb4a332f894e6c5801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF2 5284 bytes
font_01_sfnt_off000061df.bin
95bc359c541a598d04b23c3dff045b035d8c7d4fc384034a6553462455da12e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 1608 bytes
font_02_sfnt_off00006a0a.bin
1cef0fda04aae54285734902274f325e78fe5b486b40f7550bdf79b72c255961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0A 9580 bytes

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