Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53b3712f7e1b6d8…

MALICIOUS

PDF

47.4 KB Created: 2020-08-28 10:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e0fc5932c6bca80053eeecacf1a18250 SHA-1: e3f8cac92f5d0a214a540ea1409217b4a8d987c7 SHA-256: c53b3712f7e1b6d840dd3f715767de6981bde5936dd1cbc7572d3cefc17c6877
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.club/pify?keyword=ielts+reading+alternative+energy+sou In PDF document text
    • http://files.bannerfieldfarm.net/uploads/1/3/1/4/131453674/zuxil.pdfIn PDF document text
    • http://losipuxig.rsllcw.com/uploads/1/3/2/6/132682883/luriwizogage.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/1/0434/0970/3061/files/load_bearing_wall_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8072/9251/files/katalog_kabel_supreme_nyfgby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/paypal_change_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4429/6088/files/antrenmanlarla_matematik_yeni_nesil_tyt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/lapumelujujujetupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0301/9170/files/karate_suit_size_guide_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/dulopixilomusitupopeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/72621142739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/benolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/searching_and_sorting_algorithms_in_data_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/alloying_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/nonazawaratiwosuba.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 5092 bytes
SHA-256: 696430f38a9ff20521afebb412f720e71bf62c06e5d0c02b64ded47a0cdf71b2
font_01_sfnt_off00008a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3F 11664 bytes
SHA-256: f9374c7e1380519605e7d570f52906c3b7bd4bcc80a531350ecf7a9fb0eacc30

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