Malicious PDF — malware analysis report

Static analysis result for SHA-256 169fcd4adf9c976d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-04 16:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b16425519387bcff32fd368ac7611734 SHA-1: d0e800cbc5c94a3c665fc48d33c9c24fa2fedeae SHA-256: 169fcd4adf9c976d233a988399fd108340beb526218e8378b92ec04cf9a517da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body and heuristics indicate a lure for free downloads, likely leading to phishing or malware. The ML classifier strongly supports the malicious nature of this PDF.

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=ngo+bylaws+pdf+in+english In PDF document text
    • http://tefolir.designs-by-nathan.com/uploads/1/3/1/4/131453041/5797017.pdfIn PDF document text
    • http://nufab.enidbridalshop.com/uploads/1/3/1/4/131483200/4820946.pdfIn PDF document text
    • http://files.graemetresidder.com/uploads/1/3/2/7/132740186/860fc937.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/1/0438/3100/1238/files/11105716539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/11380712263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/43704704247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/89157768420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0124/2015/files/denorejetigejalibuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/kewupubafesudaparog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/jeep_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/debodurexowozimojutobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8761/7436/files/vimumur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/dinetizube.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_off00006019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 5508 bytes
SHA-256: e264bd079cc8a53ed40871e3ff0aaa3dacfdea0febd6c806b7916045fa4adc22
font_01_sfnt_off000072f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F7 9908 bytes
SHA-256: 23ee72bb51a285773c4d05ba6ba3a4d80922f154da4161873da143cda815ea84

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