Malicious PDF — malware analysis report

Static analysis result for SHA-256 092dcd4fece3beb7…

MALICIOUS

PDF

38.8 KB Created: 2020-08-25 04:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 714c04488f6d8f0a321645bc59448fc4 SHA-1: 550188dfac82b01ef03e3525266a53afeb109391 SHA-256: 092dcd4fece3beb73d1b40a69471902925a53271c183c59789313efb95ed7630
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, https://ttraff.cc/pify?keyword=chiedere+scusa+formalmente+in+inglese, which is designed to lead users to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=chiedere+scusa+formalmente+in+inglese
    • http://files.conseilscolaire-schoolcouncil.com/uploads/1/3/1/4/131407042/bisava-pegivuwodezuki-nekuzivize-ripogijax.pdf
    • http://files.kcboutique.shop/uploads/1/3/1/3/131379543/pupimulibex.pdf
    • http://files.stressfreesettlements.com/uploads/1/3/2/6/132681954/putog-xitos-xizaz-tiwuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/gegimorutawonakovoti.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4403/files/sanaworuvagomeloj.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/memutonevizesofa.pdf
    • https://cdn.shopify.com/s/files/1/0438/6501/4432/files/giguxifesefisuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2780/6883/files/60564895956.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/10271392631.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_off000057e6.bin
be173e3c233a84ce254dd9dc98e4e35007f742819845585edf9e3c1f0f53a0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E6 5340 bytes
font_01_sfnt_off000069e6.bin
94fcfa89abbcb5384df726cac75dbaf296825c93c9edca3fedde50fb980a1c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E6 11324 bytes

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