Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f200153bc346ad…

MALICIOUS

PDF

44.7 KB Created: 2020-08-22 04:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 370c1ac6e50bcbed0900fd2a543b1016 SHA-1: 34e4259d93c1357c2a8b664d5a76d8cefe9fc6b4 SHA-256: e4f200153bc346ad45e20f8878b04357aa1970db1d04251dfc39262125d6d8a5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains references to a game guide and the malicious URL, suggesting a lure to entice users to click the links. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms a malicious intent to lead users to harmful sites.

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.com/pify?keyword=ragnarok+eternal+love+premium+guide
    • http://files.fabricairsa.co.za/uploads/1/3/2/7/132712050/2082922.pdf
    • https://cdn.shopify.com/s/files/1/0433/7854/0700/files/8097212152.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/51170176964.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/circle_theorems_proof_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/5828112061.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/angie_rolling_stones_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/86474653632.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/towinafuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/ap_calculus_derivatives_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/1452/0995/files/94420574363.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/53478931658.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/flame_test_lab_report_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5917/files/blend_letter_sounds_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/capacitors_and_capacitance.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5506/files/tujomujolefo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c7.bin
5287224375ed8a7e5920f953f0dd6934dc8beb8f1c18ef7e6d57c76dcc27466c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 3380 bytes
font_01_sfnt_off00006eeb.bin
89738d9e89f3ccffa7f4e44c663a1884276bc3cb80e5e671748129b3136347c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 5232 bytes
font_02_sfnt_off000080b0.bin
a677b9569b1f7d8a5c11945e6239d7ee88fa567aae787266c7c8e0483144c01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 10704 bytes

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