Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d8ac645163e488…

MALICIOUS

PDF

59.4 KB Created: 2020-08-25 07:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50e0f23932a4e9b4c532ca2c3b251d41 SHA-1: 5e4ab13d41ed336ea26c56ee307be328a9ff1d86 SHA-256: f8d8ac645163e4883a7ab2009b03a7bec1d2ce9dfbd98c6dddeb55c573fe2c68
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=hello+in+korean+language+informal'. Additionally, it features a PDF link farm heuristic, with multiple links embedded, some of which host PDF files. The document body, though partially corrupted, contains the same malicious URL. This indicates a likely attempt to lure the user to a malicious site.

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.com/pify?keyword=hello+in+korean+language+informal In PDF document text
    • http://files.store.sssus.com/uploads/1/3/1/8/131856247/502cb8.pdfIn PDF document text
    • http://files.nofilterbydreah.com/uploads/1/3/2/6/132695408/661cae.pdfIn PDF document text
    • http://files.fodraszbutor.com/uploads/1/3/0/7/130775373/kesudesokizes.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/1/0433/0687/7080/files/74808095599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8262/9798/files/dasar_dasar_akuntansi_jilid_1_al._haryono_jusup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/best_android_high_graphics_games_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/autodesk_3ds_max_shortcuts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/mekuziximimuvutogerelorub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/4369638499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/gigarokigamuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/51478964566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/indie_game_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rurevudiwosezumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2087/6962/files/metso_apron_feeder.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000822c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822C 14412 bytes
SHA-256: ba1cd496553cbbc342693c9b044ced706a3a86bce69e636a7054f84498d6454e
font_01_sfnt_off0000ad3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3D 4932 bytes
SHA-256: 10846b5db9beec58d64d31fa6944d09dd16088d1a3e49f864e5e2bfd6f73472d
font_02_sfnt_off0000bdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEA 10024 bytes
SHA-256: 93eef4ab9d900fefca508b6e360ceb8e86c76983b76333d857966e1abb2cc0d3

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