Malicious PDF — malware analysis report

Static analysis result for SHA-256 837453761d7a8407…

MALICIOUS

PDF

44.3 KB Created: 2020-08-20 19:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6edbbe61d24b58f92987b1edd54174c9 SHA-1: 8de872ca16eed94ba936497353a1c703b6a86046 SHA-256: 837453761d7a84077be77baf130c8275ad5738b0504db1a8331d9fd6b6b041c3
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, with a primary URL pointing to a known redirector. The document body, though heavily obfuscated, contains embedded URLs that mirror the malicious redirector and benign Shopify links. The ML classifier strongly flagged this PDF as malicious, suggesting an attempt to lead users to harmful content or phishing sites.

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=axes+io+hile+apk+day%25C4%25B1 In PDF document text
    • http://files.firstaidmissionsofhope.com/uploads/1/3/1/8/131871633/823741c7740.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/1/0430/9316/4181/files/roperow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/46638878884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/bokujagonukadose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/973065489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8273/6031/files/ccvc_words_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/23664360202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/78251659804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/kibudalobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/velekuraj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/95590756916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/95887657591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/fukibixutizewojig.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 5

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_off00005896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5896 5208 bytes
SHA-256: 5118e6b689211647bcee52f2e6fba3bc2196c173d86114b985dbaa81f07ca8d4
font_01_sfnt_off00006a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 10204 bytes
SHA-256: aea702595e29c8af1d02bd8b5f9fd2100187da61975322337540fcf188f5dccd
font_02_sfnt_off00008d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 16208 bytes
SHA-256: 22e3ed72ec786726e24aeec7aff45d373814b70caf4fc246d2ab4bb179c318f6

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