Malicious PDF — malware analysis report

Static analysis result for SHA-256 394d629dde69a9e2…

MALICIOUS

PDF

36.6 KB Created: 2020-08-28 04:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f0fffbd4b64e7a512783fc6e982e355 SHA-1: 6609942b84b01ec54f9108fe70d2bb94c297467e SHA-256: 394d629dde69a9e221d98352d94de105b1efae00f2751f165fb77a64a1ed6e10
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=feria+matematica+preescolar'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on cdn.shopify.com. The document body contains garbled text but includes the same malicious URL, suggesting a lure to click on the link for 'Feria matematica preescolar'. No scripts were extracted from this sample.

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.me/pify?keyword=feria+matematica+preescolar In PDF document text
    • http://files.3rdavewine.com/uploads/1/3/1/1/131164352/pomupebirokemodok.pdfIn PDF document text
    • http://files.gefcsports.org/uploads/1/3/1/8/131856271/rezibutow.pdfIn PDF document text
    • http://files.trchurchofchristcourses.com/uploads/1/3/1/3/131379740/4249720b7a7.pdfIn PDF document text
    • http://files.yehyehs.com/uploads/1/3/1/4/131453902/bc284484.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/1/0432/2358/0831/files/drivers_license_test_illinois_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/97530812238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7693/5070/files/kitiwomerigixogozog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3368/0282/files/gusasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6679/9766/files/febodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/munonogugizosubiwojur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/best_editor_alternative_to_acrobat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/41674090947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/zuputumuwikavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/cambridge_english_fce_vocabulary_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/criminal_law_cases_and_materials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/open_excel_file_in_google_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/75153086867.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000534b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534B 5032 bytes
SHA-256: 7fd86427f99cd009fe29c27de6e8d4bb9dc9a2478ccb054685a4fd190d571d49
font_01_sfnt_off0000644d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 9692 bytes
SHA-256: 20e0666e163ad140ea67c913ef3fa0a0dbd61297be00600694b1a66e2c4796f8

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