Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94d0babf524641c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-28 12:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 2098029fb009e479d67da099ec56d61f SHA-1: cf81d4e7206d5b176dd96ec08c1ae5f47d1ebf4f SHA-256: d94d0babf524641c876c2a5fb97b99da001d631887c7d7804e21da7e32c95efa
194 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector service, disguised as a software trial offer. This heuristic firing, combined with the ML classifier's high confidence, strongly suggests a malicious intent to redirect the user to a harmful site. The document body and embedded links further support this, with many links pointing to external PDF files, likely part of a link farm or SEO manipulation to improve search engine ranking for malicious content.

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=adobe+after+effects+cs6+trial+windows In PDF document text
    • http://rerenak.geraldineschubert.com/uploads/1/3/2/6/132681352/9447336.pdfIn PDF document text
    • http://zadopejo.stjosephgrad.com/uploads/1/3/0/7/130776208/roguguwug_zuvin.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/1/0431/6079/7333/files/the_5th_wave_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/42440295379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/vurilosixigowagevajovud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/diagnostico_ambiental_participativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/faithless_drifting_away_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/c_windows_system32_drivers_etc_hosts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/wonder_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/vinovibupamugog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/unbreakable_confidence_jordan_ray.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/kerisedi.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_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 5392 bytes
SHA-256: 66163282b325d13b676e16a710c625e00ab11089d59e79d4089a78c593879df2
font_01_sfnt_off00007310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7310 10240 bytes
SHA-256: 967e29a294878795b3efc38619bb611ba095c8fb4596dbdeaab5ff88c773a928

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