Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b42384d58e4add…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 20:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 827f512580cbdc7f4121dd767306cb5f SHA-1: ddf1b16c2461bdec69216e936082c3419df4d5fe SHA-256: 21b42384d58e4add90ed48ad18a8b63624465b0c3e9d82d07d0eee3fe2412d93
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com. This domain is used to lure users into downloading potentially malicious content, as indicated by the 'cisco packet tracer' keyword in the URL. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to obscure the malicious redirector.

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=cisco+packet+tracer+7.+0++for+windows In PDF document text
    • http://files.mysailtalk.com/uploads/1/3/1/4/131454770/kenuluwulum_konojajimim_givenuzukev_xomixefetegitoj.pdfIn PDF document text
    • http://files.bellavitatileoverstock.com/uploads/1/3/1/4/131453299/jusedija.pdfIn PDF document text
    • http://kijiji.nigelbeebe.com/uploads/1/3/2/6/132681790/10d33db27.pdfIn PDF document text
    • http://files.yorkregioninjurylaw.com/uploads/1/3/1/3/131383727/nadadonomiko_xisujezude.pdfIn PDF document text
    • http://wikewu.gibault.org/uploads/1/3/2/3/132302780/daxaralejawemisujixo.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/1/0438/5341/4565/files/tawavox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/ziselunuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/93829695936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/98346649519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/ardipithecus_ramidus_and_the_paleobiology_of_early_hominids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/12904965294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/carpenter_logo_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/lujovijobaworowifiwuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90840236881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/majesty_chords.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 5

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_off00005e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 5432 bytes
SHA-256: 0c86d357f04389be3c8c878fa95f42261182225a0c572630296bdb049208baee
font_01_sfnt_off000070c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 9964 bytes
SHA-256: e2d1d6b7eda54e1722cb501826c8b252f0a844760de81abd544ebd820aa61ee1

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