Malicious PDF — malware analysis report

Static analysis result for SHA-256 03707f66a6615923…

MALICIOUS

PDF

40.1 KB Created: 2020-09-02 21:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c64ff2316da37d5ca54e93ab5e7f45f SHA-1: da4235bf2e5d4c3ace48223d980218f5fe322249 SHA-256: 03707f66a6615923b44c579096817dde5b0e46105862939efdd91419f235a2d7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=halloween+masks+printable+template', is designed to lead users to malicious infrastructure. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to deliver a payload or phish the user.

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.me/wix?keyword=halloween+masks+printable+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/kinafubetimeserirulama.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/nipurabojawavujogowamax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/brake_drum_forge_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/churidar_neck_designs_2018.pdf
    • https://static.usrfiles.com/ugd/e948c1_c33401fb5c524faa86168a68ac20c65f.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/daviwadipe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/fedozuraxusidipuvok.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/75423830621.pdf
    • https://cdn.shopify.com/s/files/1/0438/4240/4512/files/27233688262.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8085/files/cardboard_pinhole_camera_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/2018_odia_new_film_song_dhoom.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/probability_and_stochastic_processes_yates.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1018/files/91005523096.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/abdominal_wall_layers.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_off00005f22.bin
16e94fa7344e32775917d816fee5993c5e143ddb7b6d20d38bac6da155ebff4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F22 5220 bytes
font_01_sfnt_off000070d5.bin
8d89405aaa808faf324e5bc75fdc0adaaf72f52118ed9ce6c764a0c8bba8e5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D5 10172 bytes

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