Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad80d87cbb2ab34…

MALICIOUS

PDF

49.8 KB Created: 2020-07-29 07:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 291110b503f24a441f2c80f3913a1217 SHA-1: b9e73e21fcc6da8acf138c232c9f54da9f59ee93 SHA-256: 9ad80d87cbb2ab342e7003b40a1d7df6661e55167df83a755539f96b33d5c3ed
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=personal+statement+for+internship+sample+pdf In PDF document text
    • http://files.archunterdon.org/uploads/1/3/1/4/131453036/molikikevuz-fawolokezi-budegos.pdfIn PDF document text
    • http://files.thetrashtalkblog.com/uploads/1/3/1/4/131408581/4648200.pdfIn PDF document text
    • http://files.williamtmohn.com/uploads/1/3/1/3/131384777/092ef0e2ce8f7.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/1/0427/5650/5756/files/87347518624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/79200649214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/63226410259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/55910438398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/85241046182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/84956190237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/gufevanepigivepexuviva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9983/0939/files/gapegawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/sajumapituka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/15029123936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/31108609680.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_off000086af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AF 5068 bytes
SHA-256: 7ce3a833d38bc81c77c728e1572cb9158069dc9caca0b07603e5f07e3f6f92d6
font_01_sfnt_off000097b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B2 10008 bytes
SHA-256: dd8f777736296c0d7ad6bdc8bf269f3229e0b775232a6ea2a2c983efdab46efc

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