Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c77cf5c38cd91d…

MALICIOUS

PDF

90.6 KB Created: 2020-08-14 06:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dff2c5d9745f53602095162b66c5a5e SHA-1: 1ff92a536e905ae049fcf16fe1db66971e8ad14c SHA-256: 10c77cf5c38cd91dc3e0b721f1854c6075ffb815751e64356bd16f958be12133
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/pify?keyword=tenu+dil+da+vasta+song++320kbps'. The document body, though heavily obfuscated, contains a reference to the same song title and the redirector URL, suggesting a lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or distribution mechanism. While no scripts were extracted, the overall structure and the malicious URL strongly suggest a phishing or malware distribution attempt.

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.cc/pify?keyword=tenu+dil+da+vasta+song++320kbps
    • http://files.manhattanyouthballet.org/uploads/1/3/1/3/131380558/c124c1ded0.pdf
    • http://fepab.jonesingforcake.com/uploads/1/3/1/4/131407469/kuguziti-vupelixubo-wezudonijojama.pdf
    • http://bawox.westlockbutchershop.ca/uploads/1/3/0/8/130874478/1921233.pdf
    • http://files.gavrielrosenfeld.com/uploads/1/3/1/3/131379510/3871438.pdf
    • http://files.divinefaithtarot.com/uploads/1/3/1/3/131379732/268085.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/sadamezumaviraxoraxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/bunty_aur_babli_full_movies_hd.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/interview_questions_on_control_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/equilibrio_ionico_exercicios_resolvidos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/movomozoleritawabiveposob.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/bipase.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/51687589381.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/sonda_vesical_hombre.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/vokofobimasuligudesediwik.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/how_to_craft_a_compass_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/nestle_pakistan_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/91173816379.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/babadarolelizodepijaliv.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001161d.bin
d700b5393b49f8e3e18f6d2ab5d20b6cf8feba1da856b3b326a829c14b070136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1161D 4396 bytes
font_01_sfnt_off000125a5.bin
84e91d238fbf1ff13fc5c935976113dc5b12cc5c5b4949bb6d20f585f04b405a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125A5 5684 bytes
font_02_sfnt_off00013912.bin
2946b201a1d87886b21d515ca138c5bf272c0d8c196719492067a15dddb9cbb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 10472 bytes

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