Malicious PDF — malware analysis report

Static analysis result for SHA-256 770ae407e00dc3a9…

MALICIOUS

PDF

43.5 KB Created: 2020-10-08 00:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 351667205eb6cd905d5c46e2d4dd02c7 SHA-1: 659c2940bf24ba9412ad924367c856fac0d24eca SHA-256: 770ae407e00dc3a96f21e247e96f68c0250d4d080540e0cc8f3e8f7d3c59f136
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=sorting+things+out In PDF document text
    • https://site-1039618.mozfiles.com/files/1039618/80393787110.pdfIn PDF document text
    • https://site-1042020.mozfiles.com/files/1042020/benidawikuresukudoneg.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/mekopuzurixuku.pdfIn PDF document text
    • http://punujuka.beastchoirs.com/uploads/1/3/1/4/131453247/8079440.pdfIn PDF document text
    • http://togej.luyiwangart.com/uploads/1/3/1/4/131437158/tinugojox.pdfIn PDF document text
    • http://futukom.blueskiesforchildren.org/uploads/1/3/0/7/130776553/f8011.pdfIn PDF document text
    • https://site-1040095.mozfiles.com/files/1040095/gigukojarokobutazeledef.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/65514337680.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2790/8766/files/mosbys_drug_guide_for_nursing_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/rusawapizalogexepebopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1873/0902/files/distinguish_between_c3_c4_and_cam_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/85713893122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/33948221795.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 4572 bytes
SHA-256: 555f996fc1543b9ae3af8eeab208635e3f3b49a3364f79074c22db94efe3ceff
font_01_sfnt_off00006f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 10584 bytes
SHA-256: 7541940204f1fb6b56b52d26559b23abc0c8064d54f7bd2044fceab7e9881624
font_02_sfnt_off0000935e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71