Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d6015a4bfec40d…

MALICIOUS

PDF

41.5 KB Created: 2020-09-18 13:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb17a9de8701f59f3a36dca8c47eb054 SHA-1: db477f9fa7a6eb0c64795ba313139943fe57386d SHA-256: 69d6015a4bfec40d236ad5e4cc97af594bdefee9d1df4b697f43718a5c540dfe
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a lure for a game hack, indicating an attempt to trick users into visiting malicious infrastructure. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to improve the ranking of the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=apk+nba+live+mobile+hack
    • http://vijow.labyrinthsupervision.com/uploads/1/3/1/4/131406390/sedoxe.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0388/5214/files/wow_bfa_research_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1295/files/zobujavo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/juvodatupifosarini.pdf
    • https://cdn.shopify.com/s/files/1/0463/3319/8498/files/water_displacement_problems_worksheet.pdf
    • https://58286341-ed4e-45b0-a73a-ab3ef9667f3d.filesusr.com/ugd/bfd78a_99a7947abf284b07aad6d7225110a2d6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/bugubinawaki.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/formulation_and_evaluation_of_antacid_suspension.pdf
    • https://cdn.shopify.com/s/files/1/0450/4230/3140/files/switzerland_rail_map.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_off00006394.bin
c96e40f9848b26a6d7bbfbfb2e2ddab34fee7464cad6c850c6b68122aeabdd61
pdf-font-stream PDF embedded font (sfnt) at offset 0x6394 5152 bytes
font_01_sfnt_off000074fe.bin
4530f51a353bae37bff7501cf4fd457c2a3b1c40a9afe6e570796a8d67e5d8d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FE 10832 bytes