Malicious PDF — malware analysis report

Static analysis result for SHA-256 438c21f281385217…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 05:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2de0e84f630ef06c0ad59fd34b3dbecc SHA-1: 7c4371a4d8ac381a6222d81bbb0308d9684eb14b SHA-256: 438c21f2813852177f818042160818e975b3c498c9dbea17f745aba3458bda3d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a link farm hosted on cdn.shopify.com. One of the primary URLs, https://ttraff.ru/pify?keyword=3d+shapes+worksheets+grade+3, is flagged as a malicious redirector. This suggests the document's purpose is to lure users into clicking malicious links, likely for phishing or malware distribution, under the guise of educational material.

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.ru/pify?keyword=3d+shapes+worksheets+grade+3 In PDF document text
    • http://gajegip.mxrkz.com/uploads/1/3/1/8/131871395/sonunubogon_dupofi.pdfIn PDF document text
    • http://bafami.salsa2013viiisesquiannualconference.com/uploads/1/3/0/7/130775971/pilixeret.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/1/0432/6644/1376/files/99017363012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/wajasoneginegofefor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/32023325925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/fur_elise_piano_sheet_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/applications_of_graph_theory_in_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/building_foundations_of_scientific_understanding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/couper_un_en_plusieurs_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/72057214324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/jubemufolisefijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/36844685721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8285/5079/files/admirvel_mundo_novo_em.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 2

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_off00006ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF1 5412 bytes
SHA-256: 01d2cb9fcc73bfde5e6bc597c5e9e639f2385ddb5047c566df986f4db62ebfe1
font_01_sfnt_off00008264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 10088 bytes
SHA-256: 719f149e8bd4549d1c03bd50533a22466dfee0a4fbced41137e7176f63b56c7b

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