Malicious PDF — malware analysis report

Static analysis result for SHA-256 addfcce9c4b9c308…

MALICIOUS

PDF

44.2 KB Created: 2020-08-11 14:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf79c95cb82e58673607781333910170 SHA-1: 87ad2fcfdbe4b0b9b32dad9fc66b0f832deebc52 SHA-256: addfcce9c4b9c308a14426f4e1fa678006a5b25131b3e7db10589dfffdec64e1
214 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, disguised as a search result for 'best pdf reader android app'. It also impersonates document signing services, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports a social engineering attack vector.

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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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=best+pdf+reader+android+app In PDF document text
    • http://womuxasat.maryslittlegems.com/uploads/1/3/1/6/131606201/kavilupofegixud_kufasiluk_mefabuvak.pdfIn PDF document text
    • http://files.u-tokai.dk/uploads/1/3/0/7/130739712/8557899.pdfIn PDF document text
    • http://dowarisif.paolaniebla.com/uploads/1/3/0/8/130814328/891ba6d661.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/1/0435/2465/3215/files/22930160060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/effective_speech_and_oral_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/korevujox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/devisudipobano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/metamorphosis_in_insects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/vejiga_urinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31240515614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/kidinirupejoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/argumentative_essay_sample_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/99264324649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8128/5286/files/pamolimumumivejiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/absceso_dentoalveolar_cronico.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 8

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_off00007038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7038 5052 bytes
SHA-256: a756f8cb32315ad8946c9e2b473c6bf0ab432b6f07ade0a1a45bd9b268c01cdb
font_01_sfnt_off0000817b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817B 10128 bytes
SHA-256: 4187437cceb94600547c7152d3827d96f825828277e43aea05ca9d8523a60caa

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