Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0817eeebb20dd94…

MALICIOUS

PDF

48.8 KB Created: 2020-07-19 04:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 8f2c7c92998557a8145c3d65dea204ec SHA-1: 10a89f45656bdde905aca6202e60c65d954370d4 SHA-256: f0817eeebb20dd94f093e7e6c69f0a78ab10465d82fc1c8a766980ea663398c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on platforms like Shopify and WordPress. One of the primary links, ttraff.ru, is identified as a malicious redirector. This indicates a likely SEO poisoning or link farm attack designed to lure users to malicious infrastructure.

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/wb?keyword=dentoalveolar%20abscess%20pdf In PDF document text
    • http://files.pitbullleatherwork.com/uploads/1/3/0/9/130969446/vowutasivuwo-famat-rotuvusi-fifosukuxabixev.pdfIn PDF document text
    • http://files.easyfyinow.com/uploads/1/3/2/6/132695416/bebexesifofo.pdfIn PDF document text
    • http://files.kamsportswear.com/uploads/1/3/2/7/132741064/5198566.pdfIn PDF document text
    • http://files.saverenodumpsterdiving.com/uploads/1/3/0/7/130775753/243863cd99.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/1/0431/0263/4148/files/zezobudamafufozikazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/31222799810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdfIn PDF document text
    • https://jizaparuni.files.wordpress.com/2020/06/24277720365.pdfIn PDF document text
    • https://zavununis.files.wordpress.com/2020/06/29266146380.pdfIn PDF document text
    • https://lanijisivob.files.wordpress.com/2020/07/81442672088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/2788007595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/88401140174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/dikomakojur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/35582356547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/mutum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/desenopewilirowutenuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/jabosejukiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.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_off000082b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 5088 bytes
SHA-256: 4f96efeff159fbdcd79d4aba415bfc9c99b2fa927f508b52207643784674f164
font_01_sfnt_off00009412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9412 9868 bytes
SHA-256: da326a1b193b31f7e9758b55a7c72795793802e55d5b0d45ceda57c1db6fbc3b