Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e23a8914d71d61…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 08:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a5cee2e3c21f320bda8f4c7a2a21b97 SHA-1: 4ec823fb5c5a7f599543cccb1324fc925e0f534b SHA-256: 09e23a8914d71d613a21cc83db9d3dfcee1d1cb92ef8c931f2bb7ea132ce394a
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a document body that attempts to disguise its malicious intent by referencing "Crise argentina 2020 pdf". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the embedded URLs, specifically https://ttraff.com/pify?keyword=crise+argentina+2020+pdf, leads to known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample, but the presence of malicious URLs and the deceptive document content strongly suggest a phishing or redirection attack.

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=crise+argentina+2020+pdf
    • http://pepez.tonymorenodrums.com/uploads/1/3/1/4/131452922/rinox.pdf
    • http://files.militiabymichaelhill.com/uploads/1/3/1/4/131437454/benem-lenodu-pogoxuvuwixepup.pdf
    • http://files.henkpeetersarchive.info/uploads/1/3/1/4/131452988/c0c57cc.pdf
    • http://files.volunteerpotato.com/uploads/1/3/1/6/131606392/2368998.pdf
    • http://files.colleenitani.com/uploads/1/3/1/3/131381109/vedikomenorekej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/fawimebizipuvapuxare.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/jujinafufe.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/91157794733.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/21_irrefutable_laws_of_leadership_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/46427670971.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/15852757450.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/sapamugavedopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/fatowexexanobonozinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/98235355818.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/saab_9_5_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/akreditasi_universitas_negeri_malang.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_off0000666a.bin
2295598cbb0bbe5a8a938ef0e4437ecc7c5287516c522ad8b7c8fb70ce0f86c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 5356 bytes
font_01_sfnt_off000078af.bin
c37b159a573c5e2f54d7cb1508c613d61739449acf3952f675756420b3070eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10668 bytes

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