Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4db3a0f33aab09…

MALICIOUS

PDF

54.7 KB Created: 2020-10-11 22:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: af86587a15de7cfa94e8811b5aec78fe SHA-1: 4291a5e6db46affd4ee59c7012780a38ea391828 SHA-256: 9c4db3a0f33aab0978997643a10914a52aab6773e2e3cba563faea187bcff98e
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.link/pify?keyword=types+of+services+capes In PDF document text
    • http://files.cozycowcreations.com/uploads/1/3/0/7/130739745/wegeluroluke.pdfIn PDF document text
    • http://files.ice-fyre.ca/uploads/1/3/0/8/130874143/vafukemi.pdfIn PDF document text
    • http://wajiwuga.lalacookspunjabi.com/uploads/1/3/0/9/130969656/0b5a63d274600.pdfIn PDF document text
    • http://files.andrea-sangiovanni.org.uk/uploads/1/3/2/3/132302941/lubuxo.pdfIn PDF document text
    • http://files.alisonjassoc.com/uploads/1/3/1/6/131606121/67c487e3453e.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/1/0486/1834/0520/files/29332975933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8154/3079/files/sukexoxesuvoxateniwiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0179/7019/files/nomugokaridonelurabusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8049/7817/files/ark_snow_owl_saddle_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2552/5668/files/third_class_lever_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1370/7688/files/58519126969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/47191976004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d881f2dc-877f-461a-9c87-da2f43ae04f8/17154464489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb27c84-f097-4117-bad8-851b0654cd5d/56360733241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de73e154-d516-483f-9702-9d339f0af24f/49845497350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7162f32e-e60e-4768-9ff0-85a3d13800db/86156000427.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_off00009915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9915 5088 bytes
SHA-256: cc2b72782ef4d92df1fef5dd7c36dfa56f491d7100cc7d1dec73669b096982ca
font_01_sfnt_off0000aa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA83 10304 bytes
SHA-256: 68afba0cca31a4a0371262c2d591e87a36249b96e835c94f65af74c887cb4d0f

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