Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0cdd5fbfb18911…

MALICIOUS

PDF

34.7 KB Created: 2020-10-05 09:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 721f3a8da595fdc51fc416fe688da423 SHA-1: e6536eeb2696b8b152e8b047dec6368a28defa70 SHA-256: ad0cdd5fbfb18911dceef1d86bc8881bdf249fa22e974d4565f3220069b1b4c7
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.me/pify?keyword=revlon+colorburst+balm+stain+adore In PDF document text
    • http://mesibuki.morningdogcoffee.com/uploads/1/3/1/6/131606457/xaposarol.pdfIn PDF document text
    • http://files.debratsairealty.com/uploads/1/3/1/6/131606321/supazizesegobo-loraxipodiza-miwadunav.pdfIn PDF document text
    • http://files.balanceddori.com/uploads/1/3/0/8/130813025/fojegof_kisikubowa.pdfIn PDF document text
    • http://files.lapakumroh.com/uploads/1/3/1/8/131872178/f13ee7f0ca12.pdfIn PDF document text
    • http://jebipumij.alibraryisonfire.com/uploads/1/3/0/8/130874038/2657894.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94dec9e-d40b-416f-8ae7-1997a6148733/rapinafonuxadenezileg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2737/7561/files/download_useetv_apk_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/unit_15_lesson_1_lop_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8119/8496/files/dawn_of_the_clans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/dixotumiwifano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/glacier_bay_shower_manual.pdfIn 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_off000048c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C4 5292 bytes
SHA-256: 112f53703bb2837b35503c6b4acc5811ba801ed6099243a73e523863e1362b91
font_01_sfnt_off00005ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB3 10288 bytes
SHA-256: 327a47c7445843f998fc3b72190afe99783b91129a989abea5a959b3ecf61a0f