Malicious PDF — malware analysis report

Static analysis result for SHA-256 05af05ef36884ccc…

MALICIOUS

PDF

35.3 KB Created: 2020-08-22 04:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cfdbe2224416f45fd8dda0d6cc850dd SHA-1: ddc03c2216552bc377f0bc7c5f0593de26160b08 SHA-256: 05af05ef36884ccc6f2efaede190c54802d12117b3996937ab1b8d8b66c90f5b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL, suggesting an attempt to trick users into clicking it for malicious purposes, likely to download further malware or lead to a phishing site.

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=bharat+movie+4k+hd+video+song
    • http://files.jonathanminshull.com/uploads/1/3/1/4/131453350/sabimekejiwuriv.pdf
    • http://vuvitur.elementalretreatmassage.com/uploads/1/3/1/4/131454057/0bf286c30b18e1f.pdf
    • http://rizibo.mywonderowl.com/uploads/1/3/1/8/131856158/nobejulurote.pdf
    • http://sujufar.ststephensbellevuehill.org/uploads/1/3/1/3/131380429/3a583.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/1556/1370/files/report_lost_driver_license_utah.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/international_construction_arbitration_law.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/60019401276.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/avery_business_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/ncert_maths_book_class_6_solutions_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/python_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/ff14_innocence_ex_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.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_off00004c63.bin
b57b53a8e17937451c312ea9d596baa144b3117c3dd4738f13f4f9eaf6ef6c96
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C63 5468 bytes
font_01_sfnt_off00005ee7.bin
08da66f9e796f9ffb352fc8a30e1aff99c900d53a65b6b43156f0340abba5e06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 9864 bytes