Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a283968b3194b7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-12 21:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7bea63903703e88c9c77165e011edc0 SHA-1: c178c533032369f9e4b8c34ecc1ef42273e57109 SHA-256: b3a283968b3194b7af0543b7c4f4ae07433362df08c8f744886851bf9a76f283
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link pointing to a known malicious redirector. The document body and embedded links suggest a lure related to 'Wandmaker book 1 pdf', indicating an attempt to attract users through search engine optimization or a similar pretext. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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.com/wb?keyword=wandmaker%20book%201%20pdf
    • http://jetur.northjardotchurchofchrist.org/uploads/1/3/0/7/130775443/tozopitawarid.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://faxawiwan.artgoop.com/uploads/1/3/1/0/131071114/d0945a4e7305b1.pdf
    • http://files.tregoningandco.com/uploads/1/3/1/8/131871864/3191751.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/wowokaxuputizutapojelatof.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/kakuxuvid.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/piwujuvuvum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/pojugakefesuva.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/tugetoginojoguxubuwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/jefegimujozomimova.pdf
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/tcp_ip_sockets_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/32531734717.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/dilujijesafok.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/possessivartikel_bungen_a1.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/39061060308.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_off00005f79.bin
33c26e0b87c5c6d67b51cfdc71121971b2a6025c40b5443e9467fa2c3f49cb49
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F79 5244 bytes
font_01_sfnt_off00007147.bin
89514ef0fd6a8f8ad2f3e0a49f58ced7fbffce27560cebbe0e876eb140562c14
pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 10440 bytes