Malicious PDF — malware analysis report

Static analysis result for SHA-256 344b3f21355a1609…

MALICIOUS

PDF

45.0 KB Created: 2020-10-16 04:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ac17def8c6300fdccca7a1fbd909f017 SHA-1: d85b1d1243500176d4e8f61925ef261ecc9f4bdc SHA-256: 344b3f21355a160962afc8d67a901cc3ba75f24af9476f6fa041fc5cf0462de2
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/123?keyword=comptia+a%252B+study+guide+2020 In PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/budevazemafuvonibipepowev.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/78989510689.pdfIn PDF document text
    • https://site-1039757.mozfiles.com/files/1039757/26147210914.pdfIn PDF document text
    • https://site-1039560.mozfiles.com/files/1039560/nisanojunuxavizegazupovi.pdfIn PDF document text
    • https://site-1041288.mozfiles.com/files/1041288/zukagapajanelavanut.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/wadulami.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/dezevapiwijufeje.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/wedit_bajojabo.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/1/0486/1840/6048/files/woxusewolotorevufefipun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8335/3249/files/tejuwalabodelenevulagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4460/6630/files/makalah_askep_glaukoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0726/1853/files/lulezisiveganola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9202/4739/files/togixapuzedinez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9356/4833/files/talking_stick_journey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9964/4064/files/jodopuxepeximeganosuzuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8311/1831/files/ophthalmology_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/3508412263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6390/8763/files/moodle_els_planells.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1912/7965/files/david_beckham_fashion_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1457/3213/files/if_statement_bash_one_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/xfinity_mobile_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3556/0606/files/fallout_76_lever_action_rifle_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0853/8796/files/20096694394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/lion_king_kiaras_reign_comic.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_off0000700d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700D 5432 bytes
SHA-256: 77ea2757f77c010b39118d02c1281594b819838891fd1739286130cc698f83e8
font_01_sfnt_off00008276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8276 10408 bytes
SHA-256: 5ea69d6a0f997b774d7703877b65a00ec61f184a1b24344037993fde44a79ba9