Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bfb1848fd257ec…

MALICIOUS

PDF

44.6 KB Created: 2020-10-16 21:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: df97a863f86d1509b528cf088d2b4b1e SHA-1: 2be24c3e00de550690d9a8677f9c753d60707241 SHA-256: 15bfb1848fd257ece58514981bdf9e247ef35d78c207065dd28ca6628351c209
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.com/123?keyword=1990+oldsmobile+cutlass+ciera+owners+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f877258d0f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f88cb02ab069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f884528a7683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8891217ea2d.pdfIn PDF document text
    • https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/1291215.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/5a046925978.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/3f3ce0c2bb7.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/5860339.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/9889394.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/2183818.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/1455617.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/tewerikafubuw.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/fumoroti.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/lorinukasojur.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/webuligavedike.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/b8291d3.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/1/0438/4414/1218/files/13028007268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/rose_gold_headphones_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3325/8915/files/kohler_wall_hung_toilet_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1471/7095/files/area_of_triangle_sine_rule_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4821/8011/files/mike_tyson_family_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1860/7521/files/geologic_time_activity_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/88013627138.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_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 5572 bytes
SHA-256: 90903ef6ba9e7b37166c34ff9eec17c8c542ddf1ea9a2774462e0f947e090026
font_01_sfnt_off00007858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7858 14356 bytes
SHA-256: 6c29820de8d4efb7aea607395779522f04f3bd0d7b863499e488796f3c653baa