Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f5a1adfc1d0ccb…

MALICIOUS

PDF

64.4 KB Created: 2020-08-09 13:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb4f72b2ac5ccc5e93b244b6f7c4b972 SHA-1: c10e2957b92f2a4aae109afbd4b7a3ef5941d291 SHA-256: 90f5a1adfc1d0ccb4267a954972f4ad7bc4fea42be0051c22aa5614a4e4e98c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as an 'Angular 4 tutorial pdf'. The link points to 'ttraff.ru', which is flagged as malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, confirming its presence within the document's content. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or redirection strategy.

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=angular+4+tutorial+pdf In PDF document text
    • http://files.realityisoptional.com/uploads/1/3/2/7/132712326/fixewopom-pavoj-sapawiwibise-jasavepifatos.pdfIn PDF document text
    • http://maliwazim.queille.com/uploads/1/3/1/3/131379578/8587556.pdfIn PDF document text
    • http://files.miltonkeynesmanandvan.com/uploads/1/3/1/3/131383826/timoxak.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/1/0427/4687/1974/files/76682170338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/business_proposal_sample_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/vocational_skills_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/365_bible_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/luxedit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/fur_elise_piano_easy_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/97459158559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/algebra_sample_problems_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4655/9127/files/abdc_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/lalojudepatiwudusoguneju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/key_n_peele_football_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/47588807471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9571/0113/files/zevuza.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 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_off0000b7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B9 5108 bytes
SHA-256: 6d64f8f4ab276bfb9aba9cfa8642d2d564105741b9494ee2cb01bf752b480c9f
font_01_sfnt_off0000c938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC938 13380 bytes
SHA-256: b8ee19478c28d200c262c3d5edfcc1628d6346299c1f82d0428601391fbb79d7

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