Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbb9b0d04abf92d…

MALICIOUS

PDF

43.8 KB Created: 2020-09-17 07:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e17bfab123fbf94cedb3c0e7a4147f00 SHA-1: 8a8be860c0f55ecc6d9de58ff844be2dfc1c9c74 SHA-256: dbbb9b0d04abf92d57ec7112702836e994bf4581189a71144c4bb9df363b8808
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.club/pify?keyword=r+tabel+sugiyono In PDF document text
    • http://zivud.chicksthatrun.com/uploads/1/3/1/4/131452958/632000.pdfIn PDF document text
    • http://visijazup.mindthegapprograms.com/uploads/1/3/1/3/131380623/xexalajal-gilasowab-jexuziwuleju.pdfIn PDF document text
    • http://files.lacroixfinancialcoaching.com/uploads/1/3/1/4/131454355/nifugok_fapasisemo_magufikep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/20084189761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7329/6801/files/lozidifemum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/tisezonike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/keneteref.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/lumaferibafenonuke.pdfIn PDF document text
    • https://b392c9de-3d40-4994-b892-006b2a511e8c.filesusr.com/ugd/ac1638_225ca7908fa54624a6784394083e579e.pdf?index=trueIn PDF document text
    • https://15334e69-21ec-4eff-8232-675718f0366e.filesusr.com/ugd/b1b3ad_06c63e0f78034d1cac3e7841771b0619.pdf?index=trueIn PDF document text
    • https://0fff7094-9e2c-45a9-b3a2-a6cf9065bc81.filesusr.com/ugd/39a0fd_fc43a7032d974649a71be9d9542faf28.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 5008 bytes
SHA-256: 9a66c1029f68e2ce68b6d29a47772865e28672de98dd130d45bd9bbf998660af
font_01_sfnt_off000075ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 14432 bytes
SHA-256: 40af7401de5fab54dfd763db5c5c8c0533492668f94f629430e8e088b9ef1325