Malicious PDF — malware analysis report

Static analysis result for SHA-256 798603eb6c02dc3b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-21 09:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb4b9b55f9e3a19fab337fbf91d87a33 SHA-1: 412d1c97308e4f6a462d6b405eadad2b00581005 SHA-256: 798603eb6c02dc3bee63c07ff1361dc8f0c9688cf080a9d0dcbd5d992381b684
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a movie, suggesting a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic further indicates a large number of external links, likely for SEO manipulation or to distribute malicious content.

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.ru/pify?keyword=anand+film+full+hd+movie
    • http://zajupe.inessencecreative.com/uploads/1/3/0/7/130740051/8df8e6add.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/17059403841.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/kalexeronijenamufodanog.pdf
    • https://cdn.shopify.com/s/files/1/0436/9380/1625/files/mivakurinolaxubujek.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/hul_annual_report_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/bhagavad_gita_file_in_gujarati_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/ms_university_bsc_computer_science_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/99424762748.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/save_me_smallville.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/grade_9_english_module_4_anglo_american_literature.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/present_simple_and_continuous_exercises_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/linux_administration_handbook_download.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000626a.bin
3ed9ab3130f2789d3a0df9180eb755d1aeb49e240e45fbaf9df72c5f43338d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626A 4920 bytes
font_01_sfnt_off00007301.bin
a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 2024 bytes
font_02_sfnt_off00007c96.bin
f72d859a5ee45890d10d2c3203000dcdd083e94e45512d01e946c82f763380bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 10760 bytes
font_03_sfnt_off0000a14e.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA14E 16164 bytes

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