Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e978f21be7734c…

MALICIOUS

PDF

46.3 KB Created: 2020-08-15 08:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a6041f842f68825c3c7f7424617bf86 SHA-1: b2d9075c9b12a304131e5a843ea51e8c1d501c15 SHA-256: 69e978f21be7734c3b78c995e8005c9ea3c199c53d3de05ee2bd2a482b2275d4
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, disguised as free party invitation templates. The ML classifier strongly indicates maliciousness. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

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=free+party+invitation+templates+to+print
    • http://files.tastytemptationsbytia.com/uploads/1/3/1/4/131438405/8eb74.pdf
    • http://files.wwaos.org.uk/uploads/1/3/1/3/131383444/zalakivejuliva_foviguroro_witifanegigepod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/8817917613.pdf
    • https://cdn.shopify.com/s/files/1/0428/6460/7398/files/bokukerejinivowoponuwel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/bootstrap_3_media_queries.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/takojepuzepoxarusukeri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/39872892564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/tidirifonepunaxofudopilix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/3160105898.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/53365051252.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/curso_mecanica_automotiva_senai.pdf
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/chemistry_of_advanced_materials_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613b.bin
3c4f58d2f631b1ce17573e79429935ac56690f30c6327686ce54f4db6de14633
pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 4872 bytes
font_01_sfnt_off000071aa.bin
64b97f9c221a8295ccb9d8db4a54b5cf624af206786e14c124dc3f9de0dd06de
pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 13988 bytes
font_02_sfnt_off00009e39.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E39 4324 bytes