Malicious PDF — malware analysis report

Static analysis result for SHA-256 620d3ac58ab79077…

MALICIOUS

PDF

42.7 KB Created: 2020-08-06 06:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b6b1b608dc841e26b8cc70a734e4cc4 SHA-1: a0651005b0ee5d3dfdb3e2b4896df9b54408ec50 SHA-256: 620d3ac58ab790773f2729c0da63c2845174f1f89003ee1fdc8b57ce394058e4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a link farm pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that appears to be part of the malicious redirection scheme, suggesting an attempt to lead users to harmful 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.cc/pify?keyword=28+rules+subject+verb+agreement+pdf In PDF document text
    • http://files.wataugacci.org/uploads/1/3/0/8/130874490/8075988.pdfIn PDF document text
    • http://files.bombayfrankiecompany.com/uploads/1/3/0/8/130813100/fuboduzo.pdfIn PDF document text
    • http://files.shaikheskander.com/uploads/1/3/1/4/131437313/ragevusi.pdfIn PDF document text
    • http://gorojolul.codycolliermusic.com/uploads/1/3/1/0/131070718/duwugezoveza-fepirud-mibobo-gogazix.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/1/0434/4951/6199/files/prcticas_del_curso_de_economa_de_la_empresa._introduccin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/28569252654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/dunobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/ninapajete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/gokemujazoxixilavizipotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/auditor_general_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/tirewinefixamasomamugatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4383/9385/files/pojasazuwiwusagaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/blade_runner_director_s_cut_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/what_s_my_dns.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_off000066d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 5984 bytes
SHA-256: da790706f424de8f0c4853ca465127e929a73f7702cf61257111e9b9020847f1
font_01_sfnt_off00007b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 10200 bytes
SHA-256: 59e3535e1ea1720812963765ecf49e71ad56a4d4b25fc1af9e254e26aee08448

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