Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f6c9f93bb6a20d…

MALICIOUS

PDF

33.6 KB Created: 2020-08-31 07:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25305a54108efc461786d759fd62ffe1 SHA-1: 6fd710d725e55452fdab1ec68e8d477f6c5b2857 SHA-256: 86f6c9f93bb6a20d8fe22c314477b91a06ec8a77cc88b00a09cfde31894a68a8
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One prominent URL, 'https://ttraff.com/wix?keyword=ajiking+pro+jigger+reel+review', is flagged as a malicious redirector. The presence of numerous links to PDFs hosted on Shopify, combined with the malicious redirector, suggests a campaign aimed at either SEO manipulation or distributing further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=ajiking+pro+jigger+reel+review
    • https://cdn.shopify.com/s/files/1/0432/6175/5560/files/vawepituvajegase.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/56327299910.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/2866213012.pdf
    • https://cdn.shopify.com/s/files/1/0431/7177/4615/files/66029239439.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/xojogelijalulosaderara.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/48780387870.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/95928035044.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3120/files/bologna_city_center_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/23501862416.pdf
    • https://static.usrfiles.com/ugd/b7082a_73575fe27e0748d6aa12071ed37c28f4.pdf
    • https://static.usrfiles.com/ugd/26938b_1e9bb1d1c9d1433299a1a5ee383245dc.pdf
    • https://static.usrfiles.com/ugd/ee4a13_ad885ac62f4b471bb936e0b0953ea2a5.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/33283497019.pdf
    • https://cdn.shopify.com/s/files/1/0431/2458/8701/files/lisivigekekopifobefupeji.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1153/files/contoh_laporan_keuangan_akuntansi_syariah.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_off0000470e.bin
a0e3bef82b94606afb2874c3e317303acc4015fdca20c931e9dee44674f18c60
pdf-font-stream PDF embedded font (sfnt) at offset 0x470E 4880 bytes
font_01_sfnt_off000057d2.bin
fa756df915d221b8e65902bda5a90ac4e349f74abef88ca4be51ed3e5ca02440
pdf-font-stream PDF embedded font (sfnt) at offset 0x57D2 9964 bytes