Malicious PDF — malware analysis report

Static analysis result for SHA-256 37970fae3b3ac4f2…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 22:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: adf67820e897af1677a445fe900e8e7a SHA-1: aeff27a678c48c6eacb2a95f436f3197580fd164 SHA-256: 37970fae3b3ac4f22bbf32b74b7541a3825b66d49119919c0314182af6e4c610
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One critical heuristic firing identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=tratado+comercial+definicion+pdf. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs.

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=tratado+comercial+definicion+pdf In PDF document text
    • http://files.libbyyouthsoccer.org/uploads/1/3/1/1/131164236/vovapawigesidibaz.pdfIn PDF document text
    • http://basar.dectfl.org/uploads/1/3/1/4/131437987/9267262.pdfIn PDF document text
    • http://files.thesocialsguy.com/uploads/1/3/0/8/130815381/8d0647ecdfd8.pdfIn PDF document text
    • http://mabuno.lebonearchitects.com/uploads/1/3/0/8/130814328/jovikukupovebebem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/54970466349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4387/1128/files/62813554286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/best_annotation_tool_for_ipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/17249153299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/74096388165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8881/2959/files/algebra_1_standardized_test_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/armed_forces_of_the_philippines_service_aptitude_test_reviewer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/68841670776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/95618711995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/vesenovopebimuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/technical_drawing_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/41520983404.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 4860 bytes
SHA-256: acdf5d5998c9950afdc1349b5418b8e11ed907697a0ad40cbc6bad79ca7d79c0
font_01_sfnt_off000077cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 10604 bytes
SHA-256: 5a1311e33947614ca82df18d666f1cc63536c4a144ff6992c3a5c0f0a13b9ecf
font_02_sfnt_off00009a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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