Malicious PDF — malware analysis report

Static analysis result for SHA-256 6841e82f409b4ade…

MALICIOUS

PDF

43.0 KB Created: 2020-09-02 01:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19cb07581a1a93481a9d31e1fcc5ac6c SHA-1: 5aa484d2e99b1c9a6fc9331efd1a7f65895feced SHA-256: 6841e82f409b4adefeff9aa011bb1269056ec807f04e37e5179b8fca693c16b1
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to a link farm hosted on Shopify, which is a tactic to artificially inflate search engine rankings. One prominent link, 'https://ttraff.club/wix?keyword=true+caller+ringtone+free', is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for phishing or malware distribution, under the guise of a free ringtone lure.

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.club/wix?keyword=true+caller+ringtone+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0305/1175/files/50_sombras_mas_oscuras.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/zizosewud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/16932202861.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7992/files/zatasilajifijezexifuk.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb33a94129224f33a0713f8beccb0603.pdf
    • https://static.usrfiles.com/ugd/23e9be_3378f43929fe452ab5b30773b77e95d7.pdf
    • https://static.usrfiles.com/ugd/5cd33b_f2a377c9262a4ece9c97202f4091ab3b.pdf
    • https://static.usrfiles.com/ugd/952c2e_db426684710044e1a120eeb9678eb266.pdf
    • https://static.usrfiles.com/ugd/f65518_94e0441870d24074958560ee7802a710.pdf
    • https://static.usrfiles.com/ugd/38bf1f_294cddb2ed444913aa03d93d53cab5f4.pdf
    • https://static.usrfiles.com/ugd/97634b_130afbba68324fd1b038c8d6ffbf65cd.pdf
    • https://static.usrfiles.com/ugd/b6edda_d3aecb3faa1a48bc8b81f9c0a5eddc6c.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_0bed498835e24999b2f86a365ea8977b.pdf
    • https://static.usrfiles.com/ugd/4bb894_fc9d7e78866243a59d92e681195f4851.pdf
    • https://static.usrfiles.com/ugd/b11f6d_4f6a0848bfa14d5b93accdd204cffc6d.pdf
    • https://static.usrfiles.com/ugd/cf79db_8dfa301b8953410390a1169cc41fcae4.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_off00006b04.bin
65568417b6415ff29cc1d2209497bb9ff204ab17e20efbadb64325c18d6a3d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B04 4820 bytes
font_01_sfnt_off00007b7d.bin
441243d81708dd1ab2414b33ba3589eab3e21b2ad8100b6d16aada948fedac8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7D 10624 bytes

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