Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50269732cd0b427…

MALICIOUS

PDF

38.0 KB Created: 2020-08-14 11:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f3d698dc0fe0a0508a255a50052ff17 SHA-1: 1272f8d383cae5941ab86ebaac58fcf86f7e856d SHA-256: e50269732cd0b427142ee98b4284764a2c820cd39568689bedc6041356680e7d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The primary malicious redirector URL is https://ttraff.ru/wb?keyword=divisibility%20rules%20practice%20worksheet%20pdf, which is likely used to redirect users to further malicious sites. The ML classifier strongly indicates maliciousness, and the PDF structure itself is flagged for containing a malicious redirector and a link farm.

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/wb?keyword=divisibility%20rules%20practice%20worksheet%20pdf In PDF document text
    • http://lawufu.deemashahin.net/uploads/1/3/0/8/130814328/5339405.pdfIn PDF document text
    • http://lukolor.katikatiponyclub.com/uploads/1/3/0/7/130775075/ac5dc7c4ad48c4.pdfIn PDF document text
    • http://mepapa.oceanoutreach.org/uploads/1/3/1/3/131383444/9056130.pdfIn PDF document text
    • http://magixak.christineblanchet.co.uk/uploads/1/3/2/6/132681556/60658445b7.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/1/0430/9070/6589/files/nozogefituvazivig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/kisepadofijogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/34797818801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/caderno_de_caligrafia_para_imprimir_com_letras_pontilhadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/solona_hot_tub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/21642827992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/mologapekoteroferuloto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/runs_per_game_mlb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/3064335983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/51834913917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/votabekofagavarinos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/organic_chemistry_solomons_12th_edition_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
🗂 Part of campaign: pittsburgseafoodandmusicfestival.com 6 samples

Related samples 3

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_off000055af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AF 5700 bytes
SHA-256: d0ea11b96355f7c151e88a9c9cca2b95a4bf9d9c1b5231e16505b43e5ea68337
font_01_sfnt_off00006920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 9932 bytes
SHA-256: 6ab74061e2d39add4abe410fb724b69a0f1741c9543dd77d33cc72ff98f5cbff

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