Malicious PDF — malware analysis report

Static analysis result for SHA-256 f017c534be33bf45…

MALICIOUS

PDF

67.2 KB Created: 2020-08-11 21:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70930e0888e06ed4beccf80f865da560 SHA-1: e0f0a410b2a6c3d5772da90c370e4f0c029ab954 SHA-256: f017c534be33bf4549723dba4dfefa8c442ca09f1c54020353447f958dc4a0ae
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the string 'ctet exam syllabus 2020 pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a visual download button further supports a phishing or malware delivery attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ctet+exam+syllabus+2020+pdf
    • http://files.societyofsaints.net/uploads/1/3/0/7/130776180/5025743.pdf
    • http://files.ianbakst.com/uploads/1/3/0/9/130969686/9211495.pdf
    • http://xotumu.bywayfinearts.com/uploads/1/3/1/4/131483281/kifasidevibuned-bagugudok.pdf
    • http://files.liviajatoba.com/uploads/1/3/1/4/131454850/getor_mimusufapef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/english_alphabet_exercises_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/tumotubijabok.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/taxozufevuxekusaluremaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/alphabet_letters_writing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/surakoxutivusotara.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/voxenanatajavalep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/59669059938.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/company_performance_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/69901713801.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/loliwirupubifovubirodebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/1317785533.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/jojezim.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_off0000a45b.bin
637417c447fed6eec77c48dc6680e96a0965178154ad09ebc06841daab4bd0ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA45B 5316 bytes
font_01_sfnt_off0000b685.bin
5cb5ae7c6986c2c567fcd6a613b67b6dd38c59cd17fbd91a5fe72a6ad50da0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB685 10768 bytes
font_02_sfnt_off0000db0b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 4324 bytes
font_03_sfnt_off0000e90c.bin
19b02b7b9aa49f51bab89e48fac88df4f629e7c62dd35615a3c7ee3c0110e958		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 6128 bytes

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