Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66ee991347df2bd…

MALICIOUS

PDF

53.7 KB Created: 2020-08-18 22:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e97aca48d79141acb0ac68691776877a SHA-1: fbf1232fc55d77f5879964fe77902c9a4c4b5424 SHA-256: d66ee991347df2bd5c0213441411c41195de936db21e42315a78d7601062fa0e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly. No scripts were extracted from this sample.

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=%25C4%2587wiczenia+po+endoprotezie+stawu+biodrowego+pdf In PDF document text
    • http://sidedapo.collectorsartists.com/uploads/1/3/0/8/130873826/tugexoj.pdfIn PDF document text
    • http://xabalane.trackingclubofma.com/uploads/1/3/0/7/130776445/75faf36847.pdfIn PDF document text
    • http://rifab.firstalliancechurch.net/uploads/1/3/1/4/131437914/lupodegepetizetem.pdfIn PDF document text
    • http://pagofaram.blackwomensyogaretreats.com/uploads/1/3/0/8/130814328/napuv.pdfIn PDF document text
    • http://files.eemnmissionsblog.org/uploads/1/3/0/7/130776646/180102.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/1/0432/6031/3768/files/rizatiwivanuxivexifos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0394/0762/files/birthday_invitation_wording_templates_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/zevumekemerexolij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/xalabujeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/45227715060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/87831160204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/tevofomezudata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/talomipujoranozoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/final_fantasy_xv_artbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/bankruptcy_act_malaysia_2020.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 2

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_off00008fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 5616 bytes
SHA-256: 585879595c2ae1949c0125ad43ff7b18ce33a72e57d9ea84b5156a3bae17e590
font_01_sfnt_off0000a299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA299 11688 bytes
SHA-256: 16e563ad18bd321e79e9692e688a6900cc0e25dd64530243a8a5b47b2d4c8c90

Open this report in the interactive analyzer, or submit your own file for analysis.