Malicious PDF — malware analysis report

Static analysis result for SHA-256 020852486762906a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 19:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 757b95d36f2136c3d0ab8ee0e4ade339 SHA-1: b2fa0a97895dcae657f29ca8575a72dbbd770656 SHA-256: 020852486762906af5d39566f722184f583ebe9b3ee376821b8f9a56f3d59403
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body also contains the malicious URL, suggesting an attempt to lure the user into clicking it. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent, likely for phishing or malware distribution.

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=cdc+pneumococcal+vaccine+pdf
    • http://files.eapedagogy.com/uploads/1/3/0/7/130776644/vavuzakalopanutarem.pdf
    • http://files.clsportswear.com/uploads/1/3/1/3/131380688/zovaloximixi_rotasifowawel_mikomobo.pdf
    • http://files.meditation-magic.com/uploads/1/3/0/8/130813731/bexowovimajavu-venuxajaxanu-tiselotel.pdf
    • http://serozo.martywelter.com/uploads/1/3/1/3/131384429/1848205.pdf
    • http://fefutor.singlemomunderpressure.com/uploads/1/3/0/7/130776699/pixax_nenuredujowegu_maretuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/xbox_one_controller_bluetooth.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/ridubuzoge.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/38250330040.pdf
    • https://cdn.shopify.com/s/files/1/0437/9302/3133/files/42736403892.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/41482264299.pdf
    • https://cdn.shopify.com/s/files/1/0454/3823/8878/files/35530590687.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/gowabigodegexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/makutubifogafejalasowu.pdf
    • https://cdn.shopify.com/s/files/1/0459/2467/9829/files/81729025236.pdf
    • https://cdn.shopify.com/s/files/1/0431/0676/2903/files/67254867899.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_off00006e86.bin
4ae0575ae461b2656a064218e436804dfb63372480a6d9402246c731de6bee3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E86 4992 bytes
font_01_sfnt_off00007f7c.bin
df3a45990e32d2e9c440de1c4727662532e1c738558334d327b0303b81c3dbcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10756 bytes

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