Malicious PDF — malware analysis report

Static analysis result for SHA-256 a675c98061ab899e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-23 05:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a95226e623a468244b98d19adf633262 SHA-1: c54fa30638fa514edc23ed57610bc43e6c6e36b4 SHA-256: a675c98061ab899ef9172ccfdc63efb876949aa64eb2083152a31706fe7f047f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One critical heuristic firing indicates a direct link to a known malicious redirector at "https://ttraff.ru/pify?keyword=jlab+jbuds+air+quick+start+guide". The document body, though heavily obfuscated, contains text that appears to be a "Jlab jbuds air quick start guide" lure, and the authoring application is wkhtmltopdf, often used to generate malicious PDFs. The combination of the redirector link and the link farm suggests an attempt to drive traffic 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/pify?keyword=jlab+jbuds+air+quick+start+guide In PDF document text
    • http://files.kelseyblotter.com/uploads/1/3/1/4/131406149/mixusaruvod.pdfIn PDF document text
    • http://tipom.hamiltonpotterytools.co.nz/uploads/1/3/0/8/130873851/6958390.pdfIn PDF document text
    • http://ritixer.ravenstreasures.org/uploads/1/3/0/7/130775478/sosotabowaxegifago.pdfIn PDF document text
    • http://nokebo.patrickcoll.com/uploads/1/3/1/8/131871597/mokevowojasigu_rebopemig_miwexal_vigana.pdfIn PDF document text
    • http://files.isp700.com/uploads/1/3/1/4/131483108/nigavo.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/1/0437/7473/8586/files/65122882609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/reported_crime_map_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2736/5031/files/natek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/72214865676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/luwobapokejoriv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/woxetumikivakurazuwubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2703/7336/files/17307653847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/kafufenafugate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/pdf._js_viewer_hide_toolbar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/zurusajejiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/meluzekudevagafuxibasilo.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 7

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_off000075d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 5500 bytes
SHA-256: 4aa8e7c728e841c2fdebbe1aab61186d7f135b06b6018b9eb43f57f9ae7a20af
font_01_sfnt_off0000888a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888A 10936 bytes
SHA-256: 9c8772aaeb5581c836ad51462c01fbbbf05ab7aa63ce31bf9d185c8032ca20a4

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