Malicious PDF — malware analysis report

Static analysis result for SHA-256 a667e3d94b9046b5…

MALICIOUS

PDF

50.1 KB Created: 2020-07-27 00:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8650ec4fb1e4ea7092d98155ad0ca1af SHA-1: 7e1059f0c35d7432b0186e93752a2716138ab5e1 SHA-256: a667e3d94b9046b5be75f450f49fd991d326658f5bcc8746dfcf7bbd2aa7cc2b
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Plague inc bio weapon normal guide', suggesting a lure. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further 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.cc/pify?keyword=plague+inc+bio+weapon+normal+guide In PDF document text
    • http://files.formulastudentusa.com/uploads/1/3/0/7/130776123/2206632.pdfIn PDF document text
    • http://files.fitnessbyfortitude.com/uploads/1/3/0/7/130775819/f3737c37c6e.pdfIn PDF document text
    • http://files.redshoeeventorganizer.com/uploads/1/3/0/7/130740624/rigadowiku-lupotibovevifi-pefof.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/1/0431/8360/3873/files/linalimobanajoxuwuvarevon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/18837700858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/refume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0418/files/57338227595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/bujutasagarovolari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/mojezikaturuwuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/64392587374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/6016197854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/muvopaxejiwoxusamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/gowekedejufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/nisuwejesujavekizejelela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000862f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862F 5252 bytes
SHA-256: 0972c180080e273a4c38da19e960138b4867f99408a3bb20dcdd903b74744975
font_01_sfnt_off000097e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E9 10276 bytes
SHA-256: 27a64aded08d446e0417903ff5914fe2c1fd7f08167070c086e59e6fbfe0c50c

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