Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a256270b8135a9…

MALICIOUS

PDF

37.3 KB Created: 2020-08-23 23:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 753d10ff47591efce7e1d796d39014df SHA-1: b840217cf3d3af66f480930d7948ce200d4d29be SHA-256: f1a256270b8135a92bc52582928dd0c08fe06fc5a61533db21dbd75fd04a6e37
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates a malicious redirector link to 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it's the intended lure. The presence of numerous Shopify-hosted PDF links likely serves to improve the SEO ranking of the malicious redirector, making it appear more legitimate.

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/pify?keyword=tv+guide+now+melbourne In PDF document text
    • http://zapogip.likeagoodbook.com/uploads/1/3/1/3/131382406/615084baaca.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/1/0436/0706/4734/files/estudios_de_casos_de_la_economa_ambiental_en_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/50764008402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/amortissement_comptable_maroc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7338/8953/files/passenger_let_her_go_guitar_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1261/0472/files/kisiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/vinyl_vs_cd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/cristianismo_puro_e_simples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/encyclopedia_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/gegekavukudos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/76019271416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/shots_drumline_cadence_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/oxford_discover_4_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/belajar_coding_android.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 1

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_off00005652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5652 5000 bytes
SHA-256: 46de67662e36b580e3a2ab3a17107858f466db8dbd7bd7ccb385e30dcf5b99be
font_01_sfnt_off0000674e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674E 9812 bytes
SHA-256: 057401441fcf6140d488d456bdb0949a37b143d324d3cee1710c9f7da1a86c10

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