Malicious PDF — malware analysis report

Static analysis result for SHA-256 64550ecde6f3635e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-15 01:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f34f0efdeaaced41bd2b884f7f6b783 SHA-1: 3d158beff33bad0c36080abd38cb4024370352e8 SHA-256: 64550ecde6f3635e1586d607d2647da69f3417f6eac60ad28ec549705fcaa462
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document also hosts a large number of external PDF links, many of which point to benign Shopify domains, but the primary malicious link is the most concerning. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL is a high-confidence indicator of malicious intent.

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=file+manager+plus+premium+apk
    • http://files.idrawshoedesigns.com/uploads/1/3/1/4/131408798/mujuji_sujexudofazif_tilapezusiwazi_vibizezeparusax.pdf
    • http://folusixav.agbcontracting.com/uploads/1/3/0/7/130738546/bapeb_winekuwasefek.pdf
    • http://fumiwojov.babylonbanknotes.com/uploads/1/3/0/8/130814310/lujusosol-mugijovefuk-digesapevol-winojixixavom.pdf
    • http://kekopofo.tpoopen.com/uploads/1/3/1/4/131407227/xozebipebupemex.pdf
    • http://gojinebo.shirtwithsugar.com/uploads/1/3/0/7/130775181/8806794.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/super_mario_64_ds_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/nekugukugunuter.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/stool_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/fusionner_avec_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/bar_bending_machine_electrical_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/fundamental_financial_accounting_concepts_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9643/files/gesofiravafewopiwosopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60801944673.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/giorno_theme_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/7670900149.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066cf.bin
beb2a6c8fb9f4efe153c3e02d8e1c96885bfc5f8d169ef15364d790678460cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CF 4848 bytes
font_01_sfnt_off0000771e.bin
ef06e80610ce22dce3f34600ed1fd8167439f450d035b886053ca3fddf79c12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 10296 bytes
font_02_sfnt_off00009a5a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5A 4324 bytes

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