Malicious PDF — malware analysis report

Static analysis result for SHA-256 6809868f4362bd67…

MALICIOUS

PDF

52.9 KB Created: 2020-09-02 08:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c2a6fb4c4150ef8a2d3e7730f907486 SHA-1: d3efe8aa042972787e068333b7e886b18910d302 SHA-256: 6809868f4362bd67a567a0cbc55f3f51262522599f34f067ff2426d4cd43faa3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.ru/pify?keyword=beyblade+games++emuparadise' is likely used to redirect users to further malicious content or downloads.

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=beyblade+games++emuparadise
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_25f619fe66cf499da623bac0f75446b7.pdf
    • https://static.usrfiles.com/ugd/74e905_ba416f623a014668b53ea9c4696880dd.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_8fbeb608df6447ccbebbe8140ca87fd3.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/dafawopinuvoza.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/early_vedic_period_and_later_vedic_period.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/52062195971.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/80642542572.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/bengali_recipe_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/short_persuasive_essay_on_school_uniforms.pdf
    • https://static.usrfiles.com/ugd/40512e_a2facc6547724f59be1d82313f016fa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_35c50be2dfed4c58b285b38b45f37d2c.pdf
    • https://static.usrfiles.com/ugd/162fe6_0ae472f1345e45a68d3b6278abbf9791.pdf
    • https://static.usrfiles.com/ugd/7f46b5_9c1b78f6a42f43b9bc3bc664837a33d1.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_off00009023.bin
e7d72240fdd6f6572ee86f9ceaa044f9c23593095c472dd03273e8b609ff64fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9023 5572 bytes
font_01_sfnt_off0000a305.bin
e33ae03956398fe463e5320f6e8d215eaed1b1f600cec82101fbdc9732930438
pdf-font-stream PDF embedded font (sfnt) at offset 0xA305 10376 bytes