Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2664ff5573948f…

MALICIOUS

PDF

183.9 KB Created: 2020-07-29 13:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18e9fc2be0387726bdbd1f916176d3e5 SHA-1: fb54a8346e4387d12b4fb2aa1d928a5921220351 SHA-256: 4a2664ff5573948f763487def9d1da6333ea496c063a00984bbccb79659e9b54
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The document body, though heavily obfuscated, includes metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=shrimad+bhagavad+geeta+shloka+in+sanskrit+pdf In PDF document text
    • http://files.new-model-tours.com/uploads/1/3/0/8/130874085/1868684.pdfIn PDF document text
    • http://files.sbcopywriting.com/uploads/1/3/2/7/132740218/644292.pdfIn PDF document text
    • http://files.accessyourhearing.com/uploads/1/3/1/8/131857284/c183d1b940ce600.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/xuxozagesijifozovevaderup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/danigewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5800/files/56965623747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/nosofebekum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/gasodaximeturimede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5593/8720/files/20449883744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/sunufelikojujisukogefevix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/96380723080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/roligaxibula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/xexenekipotopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/gabazalubemuminulig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/40015435749.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0002aa3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AA3B 12084 bytes
SHA-256: 98c15dbd18b759e8c4ecb1f4409716b2c860f4721f613f89cbc6b20dc68cd2f3
font_00_sfnt_off00025c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25C9A 5608 bytes
SHA-256: 8c9b9bc409ef95bfd2b1701120eade4ffeb36cd4ae08fe26c9f59a6444510e3d
font_01_sfnt_off00026f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F82 3772 bytes
SHA-256: 13f1c1acb04f6a2c0c7809b473bb32c2578594c6ef10021f571feb2e59bba7cf
font_02_sfnt_off00027b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B28 15876 bytes
SHA-256: 06e23b0fd973963ea3b6193a46e2a06dbc3abfa2b1f1556fbd7b1b81b73835c7