Malicious PDF — malware analysis report

Static analysis result for SHA-256 4917180d1ec9cdfa…

MALICIOUS

PDF

59.5 KB Created: 2020-08-06 17:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6dde088e92b254817fcc8f2b4f96197 SHA-1: 4dc3eb30588b7d7b87e517900a052e6a45b679ec SHA-256: 4917180d1ec9cdfa6732cc23fbf361d392d943a0e55aebddc44bcb02fa6be650
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=peter+pan+pdf+inglese', which is flagged as a malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute further malicious 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.cc/pify?keyword=peter+pan+pdf+inglese
    • http://pezat.sarajangevine.com/uploads/1/3/0/8/130873927/fd2265134c1.pdf
    • http://files.kingsvilleroofingcompany.com/uploads/1/3/2/6/132696112/b90e1a6b947.pdf
    • http://files.bundabergcofc.org/uploads/1/3/0/8/130814636/cb5397e87.pdf
    • http://files.scottwilsonmusician.com/uploads/1/3/1/6/131636725/kofaratoganikaxub.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/13371818778.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/mejuniluzobaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/10705357336.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/dewujinevikokexewax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/toxebepesivuvikuguzivufon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/julufu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/diy_compressed_air_dryer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/xarole.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/jixoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/wow_classic_fury_warrior_bis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/67573421735.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/zigijarerejodaxides.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acb8.bin
9360d4ff17f284f10a9cf463b9f5161e34af63d6a2399192fc347c12defab855
pdf-font-stream PDF embedded font (sfnt) at offset 0xACB8 5212 bytes
font_01_sfnt_off0000be85.bin
54cffdf8c8a5520a449ff2478c2dc5b72f972a60389dedf3414de0b6ff66f77a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE85 10076 bytes