Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f8d9a8b99c71ce…

MALICIOUS

PDF

50.8 KB Created: 2020-08-25 16:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e073c289e472b9c1252266ec76c8296 SHA-1: 34f60ee17114258248161ce394d607fde824a1dc SHA-256: d4f8d9a8b99c71ce5f1178e375d84bac633141276fd23f6655c15e4a123a0eea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, https://ttraff.ru/pify?keyword=opencv+augmented+reality+tutorial+android, is flagged as malicious and likely serves as a lure for phishing or malware distribution. The document body, though heavily obfuscated, contains this same URL, reinforcing its role as the intended destination. The ML classifier also strongly indicated maliciousness.

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=opencv+augmented+reality+tutorial+android In PDF document text
    • http://padurotut.incubator143.org/uploads/1/3/1/3/131379394/4068087.pdfIn PDF document text
    • http://pikitin.goodnote.ca/uploads/1/3/0/8/130814328/kuferogo.pdfIn PDF document text
    • http://dafolev.smokeandhoneylocalproducts.com/uploads/1/3/2/6/132682052/tuwitobivoj_jusixodul_xodujazadita_wotagarasom.pdfIn PDF document text
    • http://files.scenicrimoptometrists.com/uploads/1/3/1/4/131407315/zikusuwe.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/1/0435/7079/0558/files/temperature_sensing_devices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/mewebepumuriwokel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/zipukas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/kovetixekiviruzoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/parallel_lines_worksheet_algebra_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/71808694801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/12094822563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9585/4997/files/blitzer_algebra_and_trigonometry_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/selozag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/diwali_festival_images_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/municipal_solid_waste_to_energy.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 8

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_off00007ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 5404 bytes
SHA-256: 40e5a084e27bac09147ab66e3060bf4a91fffa218749107ab0a52cd76751ee44
font_01_sfnt_off00009247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9247 13868 bytes
SHA-256: 60114d74f3c46c9e505d3c8183860366d2edd80e2c97886d16ecc87e83679245

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