Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4ea5b7285d7704…

MALICIOUS

PDF

36.7 KB Created: 2020-08-22 00:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cea53991208b2ada57cfe1cf24756afe SHA-1: 0948d4e8c438490a298f278250145fd9fae5d777 SHA-256: ea4ea5b7285d77043faa53c8dbf928644b72d47ac15334224dad48ba6981154e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs, suggesting a link farm or phishing lure. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing attempt disguised as a document download.

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=spelling+rules+worksheets+ks2 In PDF document text
    • http://files.vintuitivewmt.com/uploads/1/3/1/3/131381066/giwunefokiduji_tivezem_kulajopegajowir_pipene.pdfIn PDF document text
    • http://files.canadoretv.com/uploads/1/3/1/6/131637546/noxiwutezepoxil_kakenolox_tanulij_kifuf.pdfIn PDF document text
    • http://tudepun.buffburro.com/uploads/1/3/2/7/132711991/4a1989dc21797a.pdfIn PDF document text
    • http://komuv.pebblehurst.com/uploads/1/3/1/3/131383936/7231223.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/1/0437/1261/0472/files/asme_b31_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/lightning_arrow_ds3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/age_of_luxaire_furnace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/how_to_copy_bf4_emblems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/xuwalotilidetez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/18210005737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/85207785971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/jadetusulatusapuliriroje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9704/7447/files/acrobat_reader_dc_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7789/4297/files/online_to_ppt_converter_free_download.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 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_off00005238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5238 5260 bytes
SHA-256: 30fe7f7c0bee6f54c9fcdc6a0d76965c20348b4b813aea174205a652a0c2b0f3
font_01_sfnt_off00006432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 9876 bytes
SHA-256: 19443a9e08a20c36d5b67d1886dfe0799b46adb38efb7460f52e8e062f724c43

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