Malicious PDF — malware analysis report

Static analysis result for SHA-256 583a8613df9b9963…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 10:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be94183d171d67e80c98e0c512bc45aa SHA-1: 211310d0de7ab7872f9e3d8d8a2732b29aad64c6 SHA-256: 583a8613df9b9963a7063e5422c5be5b9d6b3f5303cb760e2eb60774d3eb8c78
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though partially corrupted, suggests a lure related to 'classification of antiasthmatic drugs pdf'. The presence of numerous external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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=classification+of+antiasthmatic+drugs+pdf In PDF document text
    • http://files.geiusa.com/uploads/1/3/0/7/130738562/gapenuvagenexisiboj.pdfIn PDF document text
    • http://files.athenasavatars.com/uploads/1/3/1/4/131453111/4295.pdfIn PDF document text
    • http://files.lifespacedesigns.com/uploads/1/3/1/6/131637606/kuxasenojez.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0428/9855/5043/files/68791067323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/tratamiento_para_artritis_reumatoide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/vumibegume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/nefekifanugosulafar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/nazorufitivek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/26385811712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/81704109313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/lifixiwaxurelebevesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/72532440171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/the_curious_case_of_benjamin_button_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/sodufiwutoxine.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 1684 bytes
SHA-256: 51fdace8bd53b7d2e6af2c0ab3a57c298b99a0f760d42a36c32010743562cd6d
font_01_sfnt_off0000895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 5476 bytes
SHA-256: ba4e4ee74127ac92dd75357d542b0eb001207a7772f154da134e4e9367c0a67e
font_02_sfnt_off00009bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC7 10492 bytes
SHA-256: 8d23b0603ce353a3139c4b20ab72c569949f88bc3b04d5392ec74c590721a8c1

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