Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bd7b94c3c9678d…

MALICIOUS

PDF

48.0 KB Created: 2020-10-09 09:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 76adc71648f3e5e3342a108dda3dfdc4 SHA-1: f0dadeff517c0265be4346089d49b37b6e9a027c SHA-256: 48bd7b94c3c9678dc4a2f8cdd9e0caea96f5c0efd1064fb53a6939b5a4f57ef9
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://gettraff.ru/strik?keyword=the+righteous+mind+full+book+pdf In PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/59883269268.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/12323669367.pdfIn PDF document text
    • http://files.scotchmansgolf.com/uploads/1/3/0/7/130776037/tegober.pdfIn PDF document text
    • http://jewipedaj.smoljenovic.com/uploads/1/3/2/6/132681030/8800410.pdfIn PDF document text
    • http://files.javajoeojai.com/uploads/1/3/1/4/131438111/6127356.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/1/0469/0028/1504/files/boots_to_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/piaa_district_3_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/zebegenokediwipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5008/1183/files/79743117833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/mr_delivery_ann_arbor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7081/8970/files/73492559303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9051/2545/files/panasonic_arc4_es8243a.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_off00007d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5F 5396 bytes
SHA-256: 2d19b2db8e98c12e830dff6cc8168496d01490a276c5a6a53b1d7016a6783e82
font_01_sfnt_off00008f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8E 10596 bytes
SHA-256: 1d177096d17be17a0eff461e4c1b8dc8980847c0f14b6d386ddfab224677b0db