Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eaa973cb405c6b1…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 19:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9a41971dc6e2420a2de115bbdcfbb4a7 SHA-1: 2988632c6bf795c23d2a5f19925e754a894aa4e9 SHA-256: 6eaa973cb405c6b1b2e861877c7c5ddae413820f1501b0d4c282ffcbfa82e5b1
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.ru/pify?keyword=bibtex+example+file In PDF document text
    • http://mojozate.artofmccabe.com/uploads/1/3/0/7/130739678/rabuginixaxoj.pdfIn PDF document text
    • http://dokife.singaporenv.com/uploads/1/3/1/3/131383042/poganinek.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/1/0429/1536/5031/files/rixarejuriwifutuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/11559241284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/polij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/3844617371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1664/9890/files/prime_time_6th_grade_math_book_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/salutuzivebubugidovixid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/kalender_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/vifakazepasapolomojon.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_off00006b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2B 5028 bytes
SHA-256: 1229b581f3d2d17a0b560e4a55cead7f9e16f66f7be8e111a23bdde0e1b0c915
font_01_sfnt_off00007c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C44 10580 bytes
SHA-256: 9bc09b6d500adf64ca70558da4f243fbda66882cba867e045406cb23a3670182

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