Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ff50465edd2875…

MALICIOUS

PDF

48.0 KB Created: 2020-08-09 16:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013c27de94628e4c7db8d822358bd598 SHA-1: 7eb172c37fe2ae7ad905742917363890090af253 SHA-256: 05ff50465edd2875dacf424a642053628b8681c5b251d7d9d4f5e87e3303ebe7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm and redirector activity.

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=the+silk+road+book+pdf
    • http://files.thebsquadproject.com/uploads/1/3/1/3/131383380/3928268.pdf
    • http://files.maplepta.com/uploads/1/3/1/8/131856330/faraza.pdf
    • http://files.winniethesiu.com/uploads/1/3/2/8/132815298/395a727cc241b.pdf
    • http://files.jorgenlauritzen.com/uploads/1/3/1/4/131453615/nokuvopi-wufolobisevi-zisatozumeritu-samesexujufa.pdf
    • http://files.arrivecollegeconsulting.com/uploads/1/3/1/0/131070894/zumabesevem_japuza_tikiminuditeg_janiderizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/29836155619.pdf
    • https://cdn.shopify.com/s/files/1/0451/1229/5589/files/40827871844.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/21433785098.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/69055274676.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/seattle_dmv_hours.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/tidezinixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/siput.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/64244031142.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/essential_calculus_early_transcendentals.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/nulosamekifamozapavamoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/tumifulupafuwizevitof.pdf
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/15131796769.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/transient_student_ucf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9911/files/javascript_keycode_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/72075130319.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_off00007e7f.bin
bd7dead073c3c86dbe86f6deac04b9ad46619b4933cd6192b9a1ffb3e3e7993c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7F 5284 bytes
font_01_sfnt_off00009065.bin
300f0ec6afda7a526b1ae90d5f7771114e083634c9dcc6718ddea71f96604e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 10036 bytes

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