Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c86e73fa4bba25…

MALICIOUS

PDF

40.9 KB Created: 2020-10-07 22:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1a9e0b00cebbcd850c7540a69214dedd SHA-1: fe8030d9af70bae9c0efc9e448759b28ab062bc0 SHA-256: 13c86e73fa4bba254736bcddd302045d6659eb07f0b85a5f551ce34d65098a44
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=ticker+timer+worksheet+pdf In PDF document text
    • http://files.tammykraft.com/uploads/1/3/0/9/130969154/posumawamufobeb_bafepan_godugijaduvu_temarufivanuj.pdfIn PDF document text
    • http://files.canudigitnursery.com/uploads/1/3/0/7/130740455/7857202.pdfIn PDF document text
    • http://verim.jafsc.org/uploads/1/3/1/3/131383493/pasojudowepaw.pdfIn PDF document text
    • http://files.direwolfomega.net/uploads/1/3/0/7/130775387/ferod.pdfIn PDF document text
    • http://files.forthisilive.net/uploads/1/3/0/9/130970001/88705c.pdfIn PDF document text
    • https://site-1042990.mozfiles.com/files/1042990/14425809929.pdfIn PDF document text
    • https://site-1038943.mozfiles.com/files/1038943/14788683401.pdfIn PDF document text
    • https://site-1038495.mozfiles.com/files/1038495/2642749622.pdfIn PDF document text
    • https://site-1039328.mozfiles.com/files/1039328/fupipenu.pdfIn PDF document text
    • https://site-1040798.mozfiles.com/files/1040798/51295920615.pdfIn PDF document text
    • https://site-1040504.mozfiles.com/files/1040504/55133758869.pdfIn PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/68818821529.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/1/0432/8692/1376/files/64940224546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/singer_sewing_machine_table_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0736/3232/files/how_to_put_on_a_health_fairy_lights.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/vacaciones_al_sol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5637/2631/files/adding_improper_fractions_with_unlike_denominators.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_off000061ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 5260 bytes
SHA-256: 73afca7dcb301d2212363f014270cdb20f24868d40f8cc670f432c71af38ce91
font_01_sfnt_off00007380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 10276 bytes
SHA-256: b3c889471b2911f2ef68fa5dba512bd3e53d281c9f8f36ab210415d0f0388b11

Open this report in the interactive analyzer, or submit your own file for analysis.