Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fa863a954e2729…

MALICIOUS

PDF

114.9 KB Created: 2020-08-12 07:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a42c07fc8557acb1fb70b9daa777b0 SHA-1: 82e71a57accf9ca15b6b2ad51c795738ff74e479 SHA-256: 82fa863a954e272901094c2369026f91249c9ad41b0d08c13a2c17651352f431
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, a significant portion of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/pify?keyword=fisiologi+sistem+pencernaan+manusia+pdf', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment that it is designed to lead users to harmful content.

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=fisiologi+sistem+pencernaan+manusia+pdf
    • http://files.millermetalarts.com/uploads/1/3/1/4/131411542/6263940.pdf
    • http://files.agilitydreammaker.com/uploads/1/3/1/8/131857717/fejiliwasipox.pdf
    • http://files.fcccamp.org/uploads/1/3/1/8/131857315/694c181.pdf
    • http://files.bagpipelesson.com/uploads/1/3/1/3/131381540/111724.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25843483079.pdf
    • https://cdn.shopify.com/s/files/1/0430/3264/1689/files/hebrew_aleph_bet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/tous_les_journaux_algeriens_en.pdf
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/81851422876.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/23780112741.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/tipos_de_aprendizaje_significativo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/family_trust_deed_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/8294/8506/files/dasijananusanurasuzuwogez.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0946/files/accounting_information_systems_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0452/0670/0183/files/alter_ego_a2_hachette.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/pukazaxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/xonilosofoxamekubolalom.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_off00018290.bin
bbcbb23cb191e3f2127f870cdd020889a69c0881254c26d528dfd3a7d6eecfee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18290 5432 bytes
font_01_sfnt_off000194f3.bin
aae0a1b673b182c9f28c366dd15df2c75af2332d4482f225ab989eb15b2c7004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194F3 12980 bytes

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