Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b75fd95ee685b29…

MALICIOUS

PDF

66.3 KB Created: 2020-08-12 09:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d421510294396e6a11018ff27c74af38 SHA-1: e99a985a28202eff280d3679a49db73dba7b6dcb SHA-256: 6b75fd95ee685b292fa061f5c0366780088c408ff8739a8c9d0dd4e6ddf47082
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious URL, masquerading as interview preparation materials. The ML classifier strongly indicates maliciousness, and the heuristics confirm the use of a redirector and a link farm for SEO purposes. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/wb?keyword=star%20interview%20questions%20and%20answers%20examples%20pdf In PDF document text
    • http://files.dakotasdogs.com/uploads/1/3/1/4/131438453/befotoju.pdfIn PDF document text
    • http://files.francesalleblas.com/uploads/1/3/1/3/131379049/resotigodebi_xiseje.pdfIn PDF document text
    • http://safewop.vellichorshop.com/uploads/1/3/1/6/131606457/morizarupopafa-mogegi-jazarosagel-suwakixu.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/1/0439/8238/9406/files/babylon_s_ashes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/jogasejegexajisefubofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0981/0327/files/amoeba_sisters_video_recap_pedigrees_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/92044789610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1835/3821/files/macroeconomics_jones_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1725/5581/files/managing_business_process_flows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1917/9944/files/introduction_to_anthropology_psychology_and_sociology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/wudikogowirub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8869/0844/files/39240931817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/21334440628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/boss_dd-_20.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_off0000c4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FD 5636 bytes
SHA-256: 06a993cef2bde04e49071de4faffbd1c1b92d8cf12e1cbe163ee8709ea042174
font_01_sfnt_off0000d823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD823 10468 bytes
SHA-256: 3ecbd241d34fed3d45f24749c732edd52d0f4e5ec8244974e242c0fff7c8878c

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