Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3643c48855b3e13…

MALICIOUS

PDF

35.1 KB Created: 2020-10-09 04:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9e255d0c147e78f155b76eaa003278ce SHA-1: 1b364764afdf2be9404153f8c3436e6f37f7f728 SHA-256: a3643c48855b3e13e7783b9b7c9ee2f43a7e1764ddd5d795a0ad76514dca0aec
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/pify?keyword=dunlop+golf+clubs+set In PDF document text
    • http://sazukesox.genesysem.com/uploads/1/3/1/6/131636698/e9d34e55dc735c.pdfIn PDF document text
    • http://sebire.wadadlidesserto.com/uploads/1/3/2/8/132816066/5021436.pdfIn PDF document text
    • http://files.writerstellall.com/uploads/1/3/1/3/131380511/gidopogisunit.pdfIn PDF document text
    • http://files.melindaawestland.com/uploads/1/3/1/4/131407310/siwoxe.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/1/0434/6147/6504/files/10297924022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8720/2971/files/renugizakipematofadan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/lizuwalin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/spider_man_far_from_home_streaming_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6001/4487/files/copper_chef_power_air_fryer_af002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1519/9656/files/76598348323.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_off00004b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B68 5016 bytes
SHA-256: eb626339fa42ad4fd490ac077833536d901d330fe2618dec37673a0b6933494a
font_01_sfnt_off00005ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA2 10392 bytes
SHA-256: f40dcb0b40cd124cd5f53317218a475f178f848013bd45da93cb2f9dbfc05b8d