Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af89556da2d6a2d…

MALICIOUS

PDF

36.9 KB Created: 2020-09-19 04:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10c5318abfbbe3118871eb67be4a192c SHA-1: 2fae4cf34441d8e6d02995cdadab42e8b25f8e7d SHA-256: 0af89556da2d6a2d98e62fb2d1cad62e514a8f502232b49561ce88784aec74f6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'ttraff.link', indicating a redirection to malicious infrastructure. The document body, though partially corrupted, contains the same suspicious URL, reinforcing the intent to direct users to harmful sites. No scripts were extracted, but the sheer volume of links suggests a phishing or scam attempt.

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.link/pify?keyword=denver+public+library+hours+smiley
    • http://gugub.axems.com/uploads/1/3/0/8/130814328/1d684.pdf
    • http://dumupepox.marcelareyes.net/uploads/1/3/1/4/131437359/nodanopefefoledizuko.pdf
    • http://files.onyxfuneralplanning.com/uploads/1/3/1/8/131856039/9b99c4fbd259d.pdf
    • http://files.aanenetwork.org/uploads/1/3/0/7/130738812/354516f166d.pdf
    • http://ridevos.dsbcyouth.org/uploads/1/3/0/9/130968926/4606688.pdf
    • http://kezapo.danathomasevents.com/uploads/1/3/1/3/131381924/48304.pdf
    • http://files.piommiami.org/uploads/1/3/1/4/131454581/b1ab428b.pdf
    • http://pamix.wynedesygns.com/uploads/1/3/0/8/130814085/luzorupebilofut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0464/8039/2344/files/57909570534.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/xiaoli_guo_fsu.pdf
    • https://cdn.shopify.com/s/files/1/0468/8130/8829/files/best_masticating_juicer_2019_consumer_reports.pdf
    • https://381326b8-b825-4e95-b417-d36b945c8d39.filesusr.com/ugd/bbdb65_e6f74b70485744e4a4fb1aeca053c618.pdf?index=true
    • https://dd29f6f3-9f1d-4322-a2d2-72217caecfe0.filesusr.com/ugd/7ea8bb_df3c2524ffa146bbb82231ee61de5328.pdf?index=true
    • https://ad205261-342d-492f-a39c-add21c049f80.filesusr.com/ugd/0baf77_5eef4b22924e4b18af3c570aa287e7f4.pdf?index=true
    • https://55b0b90c-1f2f-4be5-86e6-8cc65db0c3d2.filesusr.com/ugd/dcf311_456f3a37c7fc454f81d2b566fdfaddc3.pdf?index=true
    • https://e2abf1d4-9a0e-450e-8ecd-9761106c3f62.filesusr.com/ugd/e32576_088f72b950a14e649cbfd309bca71803.pdf?index=true
    • 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_off00004493.bin
d4017733c2171ee930638a3f156937909828b295193f0eac511407f2006de704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4493 5276 bytes
font_01_sfnt_off00005653.bin
0aede48da22d2b45fc752ab70124186ac7e0a34a3d266dc09c8c1d03678b119b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5653 10012 bytes
font_02_sfnt_off00007873.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7873 4324 bytes

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