Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6991d8deb3c6e18…

MALICIOUS

PDF

39.9 KB Created: 2020-07-10 03:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 896d8809935b802844f06f7a77f1fa63 SHA-1: 1e1f20bf6c93c817537144c54c7ff7ad14cadc4c SHA-256: e6991d8deb3c6e18922a7cc734db7f7ac940654f6a96a36e08c1361adc75484b
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a tactic often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wb?keyword=jbl%20headphones%20e45bt%20manual'. The document body also contains text related to 'Jbl headphones e45bt manual', suggesting a lure to disguise the malicious links. The presence of a large number of PDF links, many pointing to numeric slugs, further supports the SEO link farm heuristic.

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=jbl%20headphones%20e45bt%20manual In PDF document text
    • http://files.asifthinkingmatters.com/uploads/1/3/1/3/131383733/8969968.pdfIn PDF document text
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdfIn PDF document text
    • http://files.mistletoemagicartisanshow.com/uploads/1/3/1/4/131406614/barevilebo.pdfIn PDF document text
    • http://files.turkishinstructor.com/uploads/1/3/1/4/131453943/kofutewabafisega.pdfIn PDF document text
    • http://files.sapritalia.com/uploads/1/3/0/7/130738988/6315467.pdfIn PDF document text
    • http://files.amychrista.com/uploads/1/3/0/7/130775336/sutilexazutezu.pdfIn PDF document text
    • http://files.frostphysics.org/uploads/1/3/1/3/131378779/9520446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://luwaliwev220981188.files.wordpress.com/2020/06/xoligitukemor.pdfIn PDF document text
    • https://wemekuwi606608615.files.wordpress.com/2020/07/zetuwuwupup.pdfIn PDF document text
    • https://tewuvefo.files.wordpress.com/2020/07/jugebu.pdfIn PDF document text
    • https://kawinotuz.files.wordpress.com/2020/06/dilawevasadexuwid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93434530871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B7 5280 bytes
SHA-256: 3401ec8dfe523c6db8d97c2465c0a06ba4584d2dc9a87e7c17a033521a678f9d
font_01_sfnt_off00006578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 14780 bytes
SHA-256: dcb757bb762a88cb4a846f88ca2eabdc09a93c218876f7437ed902a9734e2a0c

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