Malicious PDF — malware analysis report

Static analysis result for SHA-256 c164dbcdfd506f2c…

MALICIOUS

PDF

56.3 KB Created: 2020-08-10 13:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c42bcf4430ab000199883514a93f39eb SHA-1: bbb8cb7cff16d23efe4e8f0176ccea1c6e6c1207 SHA-256: c164dbcdfd506f2cc15b3a0c1c50293fdd2924f00abdda6561f67fd04102712c
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other external links, suggesting an attempt to drive traffic to malicious infrastructure. The ML classifier also 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.com/pify?keyword=macromedia+flash+8+actionscript+tutorial+pdf In PDF document text
    • http://files.harrylsymons.ca/uploads/1/3/0/7/130775903/xurin-sunesa-sejubo-kakoxuwinulasuk.pdfIn PDF document text
    • http://files.williamjanelle.com/uploads/1/3/2/6/132683328/gepevalazolifa-luxefikateka.pdfIn PDF document text
    • http://files.sdesworks.com/uploads/1/3/0/7/130776239/7185a1d0b8e.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/1/0434/2333/4565/files/windows_7_repair_disk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/kojekosurelupomekogaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/how_to_uninstall_wacom_driver_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/old_regime_and_the_french_revolution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/tupefexezijavibogover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5823/1461/files/java_programming_tutorials_bangla_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/70852606137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/15861763680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/detuduzusekigadeladafin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/the_alarm_band.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/zusikutupopojudosojafugig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7563/files/sezoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/watch_princess_bride_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/39626723619.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 3

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_off00009dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAD 5592 bytes
SHA-256: a58febc91900312dea70400e1ed53d89ea44ec4d9c25f23dfe828aecb2b71a03
font_01_sfnt_off0000b08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08F 10376 bytes
SHA-256: 90501093b3a883f33c1816762d9124be30f67dcc745fbf33865c55cddb86bab0

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