Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9a74d8052e790f…

MALICIOUS

PDF

119.1 KB Created: 2020-08-10 17:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7917c9a3a7da6bfacbac65be33f13044 SHA-1: 610832daf5c6791797f4a533ef936ed8491033ae SHA-256: 6e9a74d8052e790f087abf8f2e776e00cead725e8c3eea07348f4324eb87b31b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external PDFs, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. This suggests the document is part of a link farm designed to funnel users to malicious content, potentially for malware distribution or phishing. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass gateway security by instructing the user to open a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=samuele+bacchiocchi+libros+pdf
    • http://turisogos.okobojiinterlake.com/uploads/1/3/1/6/131606490/luxopemi-lovuzedo-wevakoz.pdf
    • http://dikum.deepdabarberonline.com/uploads/1/3/1/4/131437987/vamoxizorek.pdf
    • http://files.readingsbytara.com/uploads/1/3/0/8/130874231/wijalulipekij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/zigibelefiti.pdf
    • https://cdn.shopify.com/s/files/1/0428/8865/9100/files/editing_pages.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/centurylink_compatible_modems.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9797/files/photovoltaics_design_and_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/10430785519.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/15316312055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0454/5308/2782/files/sokenalemubotikoragota.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/the_fall_camus_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/5646420495.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/50301042431.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/benisedikopibekeno.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_off00019577.bin
31d7c3fbc2de973b9ee17471fefbf244341444343d6da7ea3238a605088839b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19577 5636 bytes
font_01_sfnt_off0001a86d.bin
c68987531217d233366438de58d229c79dcc1f4bbee40ec7b76742afbd74498f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A86D 12060 bytes

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