Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e17a8db971f6a5…

MALICIOUS

PDF

54.8 KB Created: 2020-07-30 15:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9e4d9d07e57129fe8bd97f605db8fa3 SHA-1: 1fe5e9fdece0ebbc6d3aa9fbac4ea9e64c03a0aa SHA-256: f4e17a8db971f6a54ed5cb870f69fa082a14802846e204ecf685c00f7e2581c3
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to academic content, likely intended to trick users into downloading further malicious content via the embedded links.

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=degradacion+de+aminoacidos+y+proteinas+pdf In PDF document text
    • http://files.lblhoops.com/uploads/1/3/1/4/131437750/075c8b5265f28.pdfIn PDF document text
    • http://files.courtneymillerpilates.com/uploads/1/3/0/7/130775115/gewarovot-siwan-lojafalipufe-xuvop.pdfIn PDF document text
    • http://files.lauragrillo.com/uploads/1/3/1/4/131453278/rezudepesij_kumijimerag.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/1/0440/0611/3430/files/pigotuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/patoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/nopuxanozakog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/fonitafuvobow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/18006284126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/56958585827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/jamaxinisibevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/88080925296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/goxuropuzav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/pudozidezavol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/90753174356.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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_off00008138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 5332 bytes
SHA-256: 6cbb662c5dd5195ac592ed7855e5f7114392646757288fe259a9748ce15f08af
font_01_sfnt_off0000934b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934B 10860 bytes
SHA-256: 48d886fb21cc8522b2e8dc71dcab7d0a1b8cb5274cb33af85b3bf7fdb3438bf8
font_02_sfnt_off0000b6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C8 16164 bytes
SHA-256: 8410399a983ff13d8311f6be84a121f1e3c5ea81213dc715b52e9d20106f071c

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