Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbd6c369719df8c…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 00:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4470aeb6caad4f122566948ff3eddafc SHA-1: f5c9c69667724c826913f913749d785946194ad6 SHA-256: 8fbd6c369719df8c676b8e9a9a103e3c76cccd200ef889bd45bc2d2e4f096412
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though partially corrupted, contains text related to 'Bluestacks without admin rights' and a URL that appears to be a redirector. The PDF also exhibits PDF_SEO_LINK_FARM behavior, with numerous embedded links, many hosted on Shopify, likely to obscure the malicious destination. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=bluestacks+without+admin+rights In PDF document text
    • http://sibil.epicministry.net/uploads/1/3/1/3/131383664/3469762.pdfIn PDF document text
    • http://files.4055nelsonavenue.com/uploads/1/3/1/1/131164063/zexakonimoga.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/1/0435/4323/2661/files/bufogexutezuwojasojuzid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/12771538148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/marine_geophysical_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/xusugusiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2530/9601/files/19978176664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/gelexajeligokodexewivomem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/29379925528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/synthetic_hair_color_guide.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 2

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_off0000680e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680E 5556 bytes
SHA-256: ed4f3f9c7b10d7eb364ba1a8486f477e53436e5b5d3aad6f1be34ed2b24dcb39
font_01_sfnt_off00007adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 10096 bytes
SHA-256: a2a051f32e707ecd39aa5007d0561a5e21cb7280cce8b84bbc9a64cefbb3edec

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