Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00debdd71e0ffe3…

MALICIOUS

PDF

205.4 KB Created: 2020-08-06 18:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09241eaf2d3b7014eb21b4581f28f419 SHA-1: c8bed056967cbd771d1e4457ecf816792c728dfb SHA-256: a00debdd71e0ffe39d98066e4b58aebb6bdfe416232aa9f73a17ff48131d31df
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=a+history+of+islamic+law+pdf'. This URL is likely used to lure users into downloading further malicious content or to phish for credentials. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.ru/pify?keyword=a+history+of+islamic+law+pdf
    • http://files.carolynnyounghusband.com/uploads/1/3/1/4/131453494/9c73546f924ec.pdf
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • http://files.golffordreams.com/uploads/1/3/0/7/130775528/zixujedimosov-zifiruzo.pdf
    • http://files.salonsuitesjessica.com/uploads/1/3/0/7/130740318/33c215a7.pdf
    • http://files.pattenfinancialservices.com/uploads/1/3/1/4/131409794/9328360.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/76954293865.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/68175367629.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6383/files/patterns_of_enterprise_application_architecture_martin_fowler_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/wixofaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/19134944565.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/42128410878.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/27444494644.pdf
    • https://cdn.shopify.com/s/files/1/0452/5257/5394/files/teachers_day_speech_in_kannada_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/wipuludadedijigifed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.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
stream_009_off0002fa94.bin
9f4b1d90faab00adb2fbfa82ab1bbe837a10684c42299508e749002a2ebb366e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA94 19008 bytes
font_00_sfnt_off0002ab33.bin
472da7d083d9d95de313b18188ef1fc30ac5390cb2739c5cc3504403f5255029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB33 5144 bytes
font_01_sfnt_off0002bcc0.bin
21bae9ea3a072e65e9bb871ba13e1dbe0cee172d8b5368b4d044eb612e284e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCC0 21092 bytes
font_03_sfnt_off00031877.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31877 4324 bytes

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