Malicious PDF — malware analysis report

Static analysis result for SHA-256 d220be7f9afbbcea…

MALICIOUS

PDF

56.1 KB Created: 2020-09-01 17:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0219cce3d80aa39cb90043c9d4011679 SHA-1: e4c919926ed905f11b2e20c1f81cbbd6bd8e8a1f SHA-256: d220be7f9afbbceaecb9358679de7ace219408e4f9118811795ffbffd4657b2e
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=applied+chemistry+notes+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site disguised as educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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/wix?keyword=applied+chemistry+notes+pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/english_phonetic_symbols_and_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/xatekovadabujebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/bihar_police_si_syllabus_2018.pdf
    • https://cdn.shopify.com/s/files/1/0460/2901/3151/files/is350_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/97667267862.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/89906586249.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/mexokewajuropo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/my_sql_commands.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/cadences_music_theory_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0450/9810/7045/files/ia_lublu_tebya.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/34669102470.pdf
    • https://cdn.shopify.com/s/files/1/0461/7948/3811/files/2012_holden_barina_cd_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/61475886511.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/drawing_for_fashion_design.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/ms_word_a7_envelope_template.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000671b.bin
9ba9e02d935739127091a242c40c4c61b075d8cb55f5b0cb281043e5d7a28ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 5276 bytes
font_01_sfnt_off000078ea.bin
63f5e3297d2a1c4d107ad3c808c2aec98a7b9283d3ee766328d8cd9f2219ba23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EA 4020 bytes
font_02_sfnt_off000088a1.bin
339da3bd2940b9915f8c79496c68eb41d64db21c27788538138c33ea37435aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A1 5596 bytes
font_03_sfnt_off00009818.bin
2e63139f1c783da6f97cac1057a3e573e309080a85d879eb20a600da803a4826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9818 10304 bytes
font_04_sfnt_off0000bb7b.bin
4362e686776cae9b5e877a8e5de4a1ff5ae9966626bcf1046762b8e3a01bbea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7B 16224 bytes

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