Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef92471628d386c7…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 05:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 463446d45671c68e9c4609c6198580ef SHA-1: c50688d691714b3f18203921ac9fa670b0b7d4e0 SHA-256: ef92471628d386c77856086184ef38f51928f6800170757eaa22484f5460912f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'cessna 172 electrical system pdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links indicates a link farm strategy, likely to improve search engine ranking and distribute 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=cessna+172+electrical+system+pdf In PDF document text
    • http://files.danceology.ca/uploads/1/3/1/4/131406527/305c18c8cefd1d.pdfIn PDF document text
    • http://files.parishat.com/uploads/1/3/2/7/132740637/pajedaxopa.pdfIn PDF document text
    • http://files.overlandgamer.com/uploads/1/3/1/4/131437864/25c5f5e66eee197.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/1/0435/2131/0880/files/89748743695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/sadosuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/18576450143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/60089697115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/nabobiromanibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6045/9685/files/que_es_modelo_biopsicosocial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/nesozezobademumavujokunin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/92983580384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6846/5053/files/55092766224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8663/4390/files/taiwan_subway_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/17307380576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/rolorosazomaz.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_off000073b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 5572 bytes
SHA-256: 24e30048714a8e9966c4d062d2a2e550000bd823f90c3823227ea87e077cd4b4
font_01_sfnt_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 12468 bytes
SHA-256: 8b7bc431bc423e6594cb0c94e230352284bf305ce77a421ae106332908b33fa5

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