Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97f50affa3b1014…

MALICIOUS

PDF

43.9 KB Created: 2020-11-03 08:31:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3f5b7049d8f8c5fac24d657b95cd97c5 SHA-1: 9cdceaec0a2a7d8f7f89b9c873f9c510c4fec57e SHA-256: e97f50affa3b10145d2514f452aec8635b56d0d60a5ab4f4fc194214d025323e
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://ggtraff.ru/strik?keyword=bodega+dreams+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_5f9bda14eb7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8ccbad3c6e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5fa0a1d3d4a7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391303/normal_5f9e8e90410e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fa0ada2695e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fa0d8259e830.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/1/0486/1054/1726/files/17194642023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/xukulik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6200/8226/files/82022233369.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/rixemadiduten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5695/4275/files/86871344805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edce7ec5-a5a4-46f7-94c4-64d712764efc/riledifuponimalesizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/71459225171.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/unusual_amino_acids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3927f05e-fc36-4e16-a8ff-67d4831f3aa7/hikayeler_anton_ehov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bf1f3e-7b8f-44c3-9156-e1adf0d95e5f/38715515003.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_off00006a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 5380 bytes
SHA-256: 4bced88efbfdd7667a1cf2b68ab079692e92f9a6a19a499c30a2e17520707e8d
font_01_sfnt_off00007c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C86 11460 bytes
SHA-256: 670c199d92c8d98e3c75fdafd54892e86290c17321f4af0caaed1271e8fd1bbf