Malicious PDF — malware analysis report

Static analysis result for SHA-256 553f3b74152669c2…

MALICIOUS

PDF

49.9 KB Created: 2020-09-10 07:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3250424520171382b09ab0fd167d3220 SHA-1: f4c5a082e9b4ce3296b7ab8923f39bbddb25bca0 SHA-256: 553f3b74152669c2dfb70eb49c33a1cb67d96503cc4b389f8ea8102d8bb6fda6
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains URLs that are likely part of a SEO-based link farm designed to lure users to malicious sites.

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.club/wix?keyword=gbf+grimnir+raid+guide In PDF document text
    • http://files.gaatn.com/uploads/1/3/1/3/131383377/7103303.pdfIn PDF document text
    • http://files.lodgestmodan985.com/uploads/1/3/0/7/130775806/jiraxebozavo_jubuwomewomofa_kazilanenidipa_nivuki.pdfIn PDF document text
    • http://jelob.effinghamelementary.org/uploads/1/3/2/6/132695839/mewuwokutiza.pdfIn PDF document text
    • http://files.drrosadilorenzo.com/uploads/1/3/1/4/131453402/tigafawowonefojotore.pdfIn PDF document text
    • http://files.rockofagesalliance.com/uploads/1/3/2/3/132303024/merazol_jivadirezefekid_rizawozojatolaw_lajim.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/1/0438/4060/2269/files/basic_spanish_vocabulary_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/viva_pinata_guid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/jukuzokiwetazidupotawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/vugexejarunofivanirofu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/432b07_a2637d75d6564bbaa6ba8fcd33851faa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76de1a_51e175f5493a4c0db934fdd3fd91db2b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/db1da1_5fca7950bda14619be6648b4f07e92fa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 3872 bytes
SHA-256: 942e821383e513fa473977b9d8bc6b49df5c05f85612010dfdd349c47d18300d
font_01_sfnt_off00006f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 5188 bytes
SHA-256: fb2e831a13e61f4075235757894300ac75e8614a024e8767baf2989947843e9c
font_02_sfnt_off00008132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 10504 bytes
SHA-256: c33ce3f5abf4c9479b08526c435e142dd29da3585df0de45fb7eb9e463e8ca10
font_03_sfnt_off0000a56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56A 16092 bytes
SHA-256: 956bd9f88d2002ae4d8912728d8614d0a8e21194bf5b6a01accc3d37d7402fbf

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