Malicious PDF — malware analysis report

Static analysis result for SHA-256 10debad8ef520f72…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 04:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b51784cb316fe45e15c4aee1be4cb757 SHA-1: 6288ad02003477f506d586c67f67b39a124fbc52 SHA-256: 10debad8ef520f72c94c96422fcfdddcb03fb0682a5ef184b384fe970460f013
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a link farm and SEO spam. The document body, though heavily obfuscated, contains text that appears to be a lure for a job application. The ML classifier strongly indicates maliciousness, and the heuristics point to the use of redirector links for phishing or malware distribution.

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=mku+private+candidate+application+form+2018 In PDF document text
    • http://puzik.alkamy.co.uk/uploads/1/3/0/7/130775607/3b280c67a8.pdfIn PDF document text
    • http://files.thelovehill.com/uploads/1/3/1/1/131164425/futubupagugil_xalef_fositaguxex.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/1/0431/5670/1346/files/bronchiolite_du_nourrisson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/gujewos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/70634442471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/rugisirikewipefepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/75758651088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/athlean_xero_workout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6501/5446/files/29653003664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/fijakesevanapizige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/tarobugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/poninumeguxiwajonefevux.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 1

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_off00006485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 5772 bytes
SHA-256: c5177ed06c35263767b6389f4acabbd82d14a74b81c5cb735aca4c7faa0a0c7a
font_01_sfnt_off0000782a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 10228 bytes
SHA-256: 513547f6398a83078408c57b2e1d42857021708141f7d892ae34d53bf9f1dd02

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