Malicious PDF — malware analysis report

Static analysis result for SHA-256 437b3448f11dfee3…

MALICIOUS

PDF

35.4 KB Created: 2020-08-20 11:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f65e104bfb71174e9a920020b3485e7 SHA-1: dcd845a9fccada2bd2e362342b9b4a8837a99e2b SHA-256: 437b3448f11dfee3142d46ee2c771c70b8b9f5d8ecee0918da70fa1d166d2d20
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=semi%20detailed%20lesson%20plan%20in%20math%20kindergarten%20pdf', is designed to lure victims by appearing to offer educational material. The PDF also exhibits characteristics of a link farm, embedding numerous other PDF links, many of which point to benign content on Shopify, but the primary redirector is malicious. No scripts were extracted, but the presence of the malicious redirector and the SEO link farm technique strongly suggest a phishing or redirection 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/wb?keyword=semi%20detailed%20lesson%20plan%20in%20math%20kindergarten%20pdf In PDF document text
    • http://files.articulatetree.com/uploads/1/3/1/8/131871864/mixirapolalimodu.pdfIn PDF document text
    • http://files.makooutfitters.com/uploads/1/3/1/3/131397973/temejiresurigesek.pdfIn PDF document text
    • http://files.pathspersonalfinance.com/uploads/1/3/1/4/131407849/4551337.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/1/0450/1300/8534/files/java_tutorial_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/7170104558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/as_10_revised_icai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/242975238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/12157056799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/tratamento_da_pneumonia_bacteriana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/59646669713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6038/8262/files/90648941397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/6437130564.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
🗂 Part of campaign: makooutfitters.com 3 samples

Related samples 8

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_off000049df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DF 5620 bytes
SHA-256: b455bca1a416bb5413785ac89c0bfe7f6e25dc285a711cb49d2f1f72fda4384d
font_01_sfnt_off00005cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC5 10444 bytes
SHA-256: 408bb3872b89db52dec50540e0ad4a8fb1944a342c196d8fb057d96cb010867d

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