Malicious PDF — malware analysis report

Static analysis result for SHA-256 1697c5724c9a718f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 16:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ebc2929187aa980b6139d4c015f2afb SHA-1: b5d9f7e23c2931fd66bf41febe027cbbbef912ba SHA-256: 1697c5724c9a718fdf8c3bdb3efa75e866781dde898d947b786515fba1c102d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is identified as malicious. The document body, while heavily obfuscated, contains a URL that mirrors the malicious redirector.

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=blowing+in+the+wind+ukulele+chords+pdf
    • http://files.globalcenterforsuccess.com/uploads/1/3/1/6/131637224/b17958144887a0e.pdf
    • http://files.mlcptsa.org/uploads/1/3/2/7/132740623/pigume-zifatako-guwepojuvutozaw-xiwemedojakeve.pdf
    • http://rojuju.plymouthmusiclessons.com/uploads/1/3/2/7/132740805/nojapesudifomej.pdf
    • http://files.oakstreetpto.com/uploads/1/3/1/6/131606670/bebezubuwavizixobava.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/arte_bizantino.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/advantages_and_disadvantages_of_work_life_balance.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/probability_worksheets_7th_grade_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/97119754970.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/verb_to_be_past_affirmative_negative_and_interrogative_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/a_clockwork_orange.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/23863781716.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/70540037441.pdf
    • https://cdn.shopify.com/s/files/1/0435/8602/7677/files/25850716638.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/wawedolevejubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/butujimuwuxoxejo.pdf
    • https://cdn.shopify.com/s/files/1/0454/5983/2982/files/infrastructure_engineering_and_management_grigg.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005847.bin
d30574700fd393a3ffcf07fa4429bb46fb375a2fce46fec3afb5aa0c3c819367		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5847 5412 bytes
font_01_sfnt_off00006abf.bin
0dcb0933f58601e0916814eba852a14b99478561bc585af01841ceb97e51c626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 15092 bytes

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