Malicious PDF — malware analysis report

Static analysis result for SHA-256 866a8f0483266e4a…

MALICIOUS

PDF

49.4 KB Created: 2020-08-27 22:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7878c50c7ea0d571719a484fc18b9298 SHA-1: c3b30428e14e0116abb2d8541c2091c296c51806 SHA-256: 866a8f0483266e4ad09edb4199b2607a4940175eb1cdd62a9c75ef995f10aab6
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to a redirector URL associated with free software downloads. The ML classifier strongly flagged this PDF as malicious. The embedded document body text also contains the malicious URL, reinforcing the lure to download software from a potentially untrusted source.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=adobe+premiere+cc+2014+download+free In PDF document text
    • http://sinabulok.newleafclubhouse.com/uploads/1/3/1/8/131856543/12c62ad338.pdfIn PDF document text
    • http://bosagano.lifebyyoga.com/uploads/1/3/0/7/130776487/sujojakawositek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/assistant_commandant_recruitment_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/nawiwefuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2513/6797/files/14369989957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/gokodofovugururulagig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/73351683282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/90989732812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/fusionner_plusieurs_en_un_seul_avec_adobe_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3174/1095/files/36211505081.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 1

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_off0000745a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 5464 bytes
SHA-256: 57ba67069e906520b9700f82c493f2a5ff94e21e230866e8708b82a392a7565e
font_01_sfnt_off000086db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 10480 bytes
SHA-256: b07a369193a061cc527139c6d88afb2089cfb7eb51eb296c7a16a4912b97a400
font_02_sfnt_off0000aaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAACA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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