Malicious PDF — malware analysis report

Static analysis result for SHA-256 1676a656e6a0463f…

MALICIOUS

PDF

47.3 KB Created: 2020-09-19 15:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 604b4c548fe90c97681b5bf8a94347d2 SHA-1: 33df71a8346e62b9857ce7ef067b2f59bdd84e5f SHA-256: 1676a656e6a0463fe4554a7ac465741fc8bac0b3ee6e4f691237e70132bafd01
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a common tactic for SEO link farms and malicious redirectors. The primary malicious link, "https://ttraff.club/wix?keyword=marine+park+school+supply+list", is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text related to a school supply list, likely serving as a lure to encourage clicks on the malicious URL. The ML classifier also strongly indicated maliciousness.

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=marine+park+school+supply+list
    • http://sitotulim.obriendevelopments.org/uploads/1/3/2/7/132712596/7724376.pdf
    • http://getub.boxelderfoodpantry.org/uploads/1/3/2/6/132682787/342f934d89b4b34.pdf
    • http://files.mrskiriluk.net/uploads/1/3/0/9/130969984/nelonaz_salowa.pdf
    • http://ruduz.belangerbagels.com/uploads/1/3/0/8/130874601/sajad.pdf
    • http://netigi.bigflatspreschool.com/uploads/1/3/0/7/130738902/2582411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/faxapavujusikamifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/niribelasivifozolakipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/rarotinixipofewazejix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/aether_portal_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/85885130350.pdf
    • https://26f32877-a65c-4d1b-aa50-97757b6ae0b2.filesusr.com/ugd/eda9ba_80f2a223718848f389e96a796f59ade2.pdf?index=true
    • https://17b0a1c6-5b04-4b93-91af-c41794a3e49a.filesusr.com/ugd/ceb2e8_3e1dbde78a3a4b7db53bd6d861ca0c38.pdf?index=true
    • https://52fab75e-ee50-4e80-81d9-d02496282b4f.filesusr.com/ugd/895bef_645fbd37a6384817bb8cc3c7469f6920.pdf?index=true
    • https://744f6284-a667-4b91-a6b5-d125d190edd3.filesusr.com/ugd/08fe48_7cd49a6cbb544ea6b5558ebd1c22168f.pdf?index=true
    • https://604e51b4-38ce-4029-9d9f-be57f63d2dfd.filesusr.com/ugd/501a20_77a4fefaec6e4e1c8ed63e8942be6de5.pdf?index=true
    • https://c0213b52-5105-4d16-8015-c76f2618592a.filesusr.com/ugd/60933b_1b6be841bbe34f93b27fba18a9bf755a.pdf?index=true
    • https://88bbc9c8-97e9-4e08-a442-11b87884a4f6.filesusr.com/ugd/3ed902_7347acb559de486e88c0ba91e00d895d.pdf?index=true
    • https://90b6f4b4-5adb-44d5-8aca-ff5b7e22ce5e.filesusr.com/ugd/15ebe2_87418d9201024bd7bdb223f4584efd05.pdf?index=true
    • https://68af2b66-9022-4d40-b28e-a9d13bffb29f.filesusr.com/ugd/564d2e_979671a01d464a63bdb1e1e1c18ede34.pdf?index=true
    • https://0aabd099-03ad-4d78-b756-28fbaf0bef07.filesusr.com/ugd/1b9faa_3706d7b8e5cc4d7399a322779b734eb6.pdf?index=true
    • 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_off00007a63.bin
9adefe592d3e9e4d10c6e10679d883a0328ac00f0fafdf3bc4c437ff670f1b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A63 5192 bytes
font_01_sfnt_off00008c1c.bin
10187dcd350c396fd4fcefafd262e361a6737edf351cdf9f9138b6c81fcc8029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1C 10524 bytes

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