Malicious PDF — malware analysis report

Static analysis result for SHA-256 9056a52de70fc1c9…

MALICIOUS

PDF

122.3 KB Created: 2020-08-25 02:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15965a9293311df3a98212af235ab3fd SHA-1: 82603304bafd62a4ab4f5b1917dcb08528ef4fde SHA-256: 9056a52de70fc1c9385f24be7122b493324f1c632b378943a97ae8f0512a25b7
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lure the user into downloading further malware. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.
  • 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.cc/pify?keyword=libra+open+office
    • http://vejibifoj.whitcombeducates.net/uploads/1/3/1/4/131407089/8429437.pdf
    • http://files.perfectlayout.co.uk/uploads/1/3/1/3/131379699/044f3628dd70f.pdf
    • http://dowile.dbehrends.com/uploads/1/3/0/9/130969408/bdad2cc9e5aed6.pdf
    • https://cdn.shopify.com/s/files/1/0437/4256/0407/files/luwasilixebapesaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/genitiv_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/vawixukabizul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufowotipopugisafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2370/files/16753262356.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/goals_soccer_centres_plc_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4985/1811/files/luzizuxuvaboritunuli.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/71681087343.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/agriculture_study_material_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/jobutoxuweri.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160f8.bin
915a9a9531a0576e2b487b035921d06d341655f92bb4f6c1f837931c071334d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160F8 9972 bytes
font_01_sfnt_off00018154.bin
06dd97e41abe1bc99783d44f5658d3584ebc23b707a95e4fcf7870157626a688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18154 4880 bytes
font_02_sfnt_off000191f6.bin
5e302158fb1ada5293636e561704d7ea5920be862f6e2a41164bfb81f9cdcda8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x191F6 16100 bytes
font_03_sfnt_off0001c412.bin
a11dd4f0555385d22d1103d04ec2045fa00eb4bfb5783510b397aa451fa985d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C412 17652 bytes

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