Malicious PDF — malware analysis report

Static analysis result for SHA-256 adef69766c976707…

MALICIOUS

PDF

40.2 KB Created: 2020-08-10 21:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd7dd421fc5194aec6b275933fe0a8c6 SHA-1: ed2a44ab309124883b8ea1714318d9a8464f251b SHA-256: adef69766c976707fca0ebd9c057d0000a418082c2f557e309712b0317a2b173
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=calendario+rusia+2020+pdf+para+imprimir. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier also strongly 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.cc/pify?keyword=calendario+rusia+2020+pdf+para+imprimir In PDF document text
    • http://paziwen.hermosawebdesign.com/uploads/1/3/0/7/130776078/gopibinoberariba.pdfIn PDF document text
    • http://files.robbenoptics.com/uploads/1/3/1/3/131380345/982b595.pdfIn PDF document text
    • http://files.braveministry.com/uploads/1/3/0/7/130775387/kotajaxuxonoz_bulusu_befororu.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/1/0433/1978/7688/files/16287468389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/gobazonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/94140919223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/27102319893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/inflammatory_bowel_disease_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/brainpop_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/3626983990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/ravojuzemagododules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/8017525915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/1018184324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/regoravo.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 7

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_off00005d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3F 5364 bytes
SHA-256: 53bc242b99d5c64b90c08d2ec1a7effedf34d44eb03ff9ef067d984b6d16688c
font_01_sfnt_off00006f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 10648 bytes
SHA-256: 0c6d601bc02f60a43f06b22d38a33d5fc7b520be3217a255251845117f1c12dd

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