Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1ad731357d3506…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 00:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a89d8681bd2e7a024f1752e4b6d9cb20 SHA-1: 5e19079396895732df814ad3c980e271ce6af06f SHA-256: 4b1ad731357d3506365f4d71fddc5a90d2c3bec8a2b78cfa8a781c7f0b2d47f7
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a link farm. It contains numerous embedded links, many pointing to cdn.shopify.com, but one prominent link redirects to 'ttraff.me', a known malicious redirector. The document body, though partially corrupted, contains text related to 'queen in hyun's man episode 1 sub indo' and the malicious redirector URL, suggesting a lure to trick users into clicking the malicious link. The primary attack pattern involves redirecting users to malicious content through a deceptive 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.me/pify?keyword=queen+in+hyun%2527s+man+episode+1+sub+indo In PDF document text
    • http://files.senorashby.com/uploads/1/3/1/4/131408062/5961382.pdfIn PDF document text
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdfIn PDF document text
    • http://rebimas.customtattooingbydavid.com/uploads/1/3/0/8/130813694/56be5dca0ad2.pdfIn PDF document text
    • http://files.rostrevortennisclub.org/uploads/1/3/1/4/131452806/terefabazijese.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/1/0433/9875/8557/files/pediatric_advanced_life_support_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/43705283981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/72102152922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9778/0380/files/8072851480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/93204151846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/keycloak_rest_api.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4403/1899/files/concepto_de_aprendizaje_autonomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/11172482129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/kufokorufilowoxewavuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/rusibomujelifizevibamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/33010165116.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAE 4160 bytes
SHA-256: 5803f87d48d4f24636ad5c4bdc529912764323c238f356aba3b8c2be8ab22975
font_01_sfnt_off00005b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B51 5460 bytes
SHA-256: dab5a694ac1f7ab6e3cb2c8801a574393f1790ca169b52c3d5f85fb3ad10c234
font_02_sfnt_off00006dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 10096 bytes
SHA-256: 95814c7b349e2a42a5eedc851ac706b4c8b36ffa6f86758bead2fc482264727a