Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65bfe38d317f27e…

MALICIOUS

PDF

58.3 KB Created: 2020-07-27 04:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d40bde1492a94585b689b9e01c2ec6e SHA-1: a19a72fe4b0515bc7706944eb0537318b2844666 SHA-256: a65bfe38d317f27ea787481b226c49b9cd3f0fcd91a7ceb6ff17d96c2a2a6512
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 a redirector service. The document body, though heavily obfuscated, suggests a lure related to 'kali linux'. The primary malicious indicator is the PDF_MALICIOUS_REDIRECTOR_LINK heuristic, which identifies links leading to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further indicates a mass of external links, suggesting a spam or phishing campaign.

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.com/pify?keyword=cheat+sheet+kali+linux In PDF document text
    • http://files.droghedaanddistrictac.com/uploads/1/3/0/7/130739308/tukoz-fuvafi-subuzisujid-zimoz.pdfIn PDF document text
    • http://files.learntodriveinbc.com/uploads/1/3/1/4/131453982/bogibekir.pdfIn PDF document text
    • http://files.healthnotwealth.co.uk/uploads/1/3/0/7/130738918/6903915.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/1/0436/9675/0742/files/tuxazefigunorapolepukejoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/84940993543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/83093280911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/6078810955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/44489238355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/zoputuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/lisixovisifok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0845/7885/files/niwodezapuwuzofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/zoredanapitazesufigum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dogagogekugubetopisebazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/89714485266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3508/1374/files/famatelodupagunibujugilim.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 4

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_off00009c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C24 4604 bytes
SHA-256: 6805d40e59b91301f18fce9d07fc87e991a08447d5f6c4bc9f1f4be71dfb9c5c
font_01_sfnt_off0000abbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBB 15580 bytes
SHA-256: 7adde46b0b3a92c4f1ea1f44b763149ea1cb05ae80da3288f365c8b0dc5e9214

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