Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae518120743d650…

MALICIOUS

PDF

44.7 KB Created: 2020-11-01 21:16:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 59f2c7757bce7a0f5bb013507b0bbb40 SHA-1: 1b78a3dc8cafa7fd4c4b8de244c0bdb16d5ec566 SHA-256: aae518120743d6501366020ebde1a60678c408c46deff62fa46222bebb08e0ce
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://cctraff.ru/aws?keyword=print+lyft+receipt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5f97892dc6a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5f8b3706246cc.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/zaluvisonagepewevufe.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/kopag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f8fb3df662d3.pdfIn PDF document text
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/zejedave_xomizilubi.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/jivefaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f90ea4ee4650.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/rikol-wujolo-kawamifuze-kefupu.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/1/0493/3360/0415/files/nodovutotufupuvozuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/google_assistant_para_android_4.4.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0400/1959/files/manual_fire_extinguishing_equipment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2527/5293/files/53284386783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5461/0605/files/50184489306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1489/3980/files/bubujataxawonal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/5575/9527/files/excel_formulas_basic.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_off00006ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 4724 bytes
SHA-256: b301b7904c5c8668ebdf86b6b94b4d9a857cdad70180b1624737f34896a2debe
font_01_sfnt_off0000802d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 11320 bytes
SHA-256: d1b9a25726b9e34da1825f8b17c019e8a302dfb9e2cc92f8ef823db75f877fb8

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