Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ac08794d25f1b8…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 00:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d4244e7ce5b279a1a82993fd78054a1 SHA-1: 0887ae6cceb578bbe433dd3df8b35048f3c837d4 SHA-256: 43ac08794d25f1b8178aada6c9aaee1d04ea2a789bb6268953cb8835cdcd9d19
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a 'Choice of superannuation fund standard choice form'. This is further supported by the PDF_SEO_LINK_FARM heuristic, indicating a large number of links, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive form, leading to a 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=choice+of+superannuation+fund+standard+choice+form In PDF document text
    • http://nijutoz.muskmeloncreative.com/uploads/1/3/1/8/131871921/c6bc160a951df7.pdfIn PDF document text
    • http://xejof.hulahula.org/uploads/1/3/2/6/132680903/b51d6baf.pdfIn PDF document text
    • http://files.emmazenfoundation.org/uploads/1/3/1/4/131411199/wusemagus.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/1/0440/3894/6981/files/fesud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/kutulesaginunasosuniwije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/40160945090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/xupepalovepotorojex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/cdc_vaccination_schedule_child.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/13037709270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/78499232540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/lewiteku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/8947771006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/c_static_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/17300273047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/5528466259.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_off000068e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 5268 bytes
SHA-256: 8a964e79a915ec26f002f92933f214829e67786ad28b30eddb58785a59a3d354
font_01_sfnt_off00007a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9C 10476 bytes
SHA-256: fa31d9e06d3940bbee7b98a764016071136ad48766460cfdb19c52cff390bf62

Open this report in the interactive analyzer, or submit your own file for analysis.