Malicious PDF — malware analysis report

Static analysis result for SHA-256 f908390b648d89f3…

MALICIOUS

PDF

64.2 KB Created: 2020-08-10 00:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4101967d6a82354f15af01ea77d17a28 SHA-1: b5822e7af98099ef35fba3f3535210d8b929ed5c SHA-256: f908390b648d89f3735d222d2f0e3de2a86d3d92ed87fc8d05188db896c06082
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a fake invoice or payment lure, further suggesting a phishing attempt. The embedded link `https://ttraff.cc/pify?keyword=big+ideas+math+geometry+common+core+teacher+edition+2020+pdf` is the primary indicator of malicious intent, likely leading to a further stage of attack.

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.cc/pify?keyword=big+ideas+math+geometry+common+core+teacher+edition+2020+pdf In PDF document text
    • http://tarum.1932auburnsedan.com/uploads/1/3/0/7/130775162/403169.pdfIn PDF document text
    • http://files.salightgroup.com/uploads/1/3/1/4/131406348/varopiwefefilil.pdfIn PDF document text
    • http://files.reikibyleslie.com/uploads/1/3/1/0/131070407/5751447.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/1/0428/1414/4675/files/a_user_s_guide_to_the_brain_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/14470764349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/sleeping_lotus_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/76302772330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/tomorrow_we_live_kb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/basic_accounting_concepts_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/92034507002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/dota_2_turbo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/serologia_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/free_wii_points_without_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/mathematics_for_economics_and_finance_anthony_biggs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4944/1688/files/sunegivezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/sosaradavekis.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 4

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_off0000b66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66C 5960 bytes
SHA-256: 5a26d02a1e778f31cf88fd3547d52606f21f3e083fa77e084391d0d2f149a6f7
font_01_sfnt_off0000caa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA2 11988 bytes
SHA-256: a434c78995b40bf2d3b309942b9adc5ef13e0f618b0120630c6240cd832ae72f

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