Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae92e17a7e6e9242…

MALICIOUS

PDF

65.7 KB Created: 2020-10-03 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: af5c1eeb28d875fa4c33a98bb1ef23c6 SHA-1: 5d3e5ac0c3f4655ceba1a2aa71d2c33a337ca1d5 SHA-256: ae92e17a7e6e924227732335695626926b4bfa188bcc2069a60953e06637de94
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://cctraff.ru/strik?keyword=ready+for+first+pdf In PDF document text
    • http://tefuvudaz.keywestresortcasino.com/uploads/1/3/1/8/131856772/lonilofimoladon.pdfIn PDF document text
    • http://files.porvoontriennaali.fi/uploads/1/3/2/7/132740361/fabijojixikidu-vagij-lawipope.pdfIn PDF document text
    • http://files.erikawharper.com/uploads/1/3/1/3/131380086/ad0ba6ac.pdfIn PDF document text
    • http://files.clonmel-acupuncture.com/uploads/1/3/0/7/130740127/439b2.pdfIn PDF document text
    • http://files.embarrass.org/uploads/1/3/0/8/130813818/b1636eb.pdfIn PDF document text
    • https://site-1039847.mozfiles.com/files/1039847/tizobexit.pdfIn PDF document text
    • https://site-1039496.mozfiles.com/files/1039496/32942487125.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/1/0479/7867/6380/files/lalafunitukafof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/23836633692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/xoxupovenademokafifunem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0736/3232/files/64082414741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/zorosowitibonudapof.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_off0000c490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC490 5112 bytes
SHA-256: ac4648e14b7b2bec60e24a24d9af63af37199c6e68a1f4131523aa3eb6bb3bb0
font_01_sfnt_off0000d616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 10588 bytes
SHA-256: de3b0dabac06fe4c59cb12d7d8b20fd7b6fa3c5c81bde1a98607b25d39d8148e