Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25c66f5339d1a4a…

MALICIOUS

PDF

37.9 KB Created: 2020-08-21 02:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84d810a1a616394d11818f964d8c5661 SHA-1: c165e705b91c7864fa0478b7387f9ee5c8c3ee56 SHA-256: a25c66f5339d1a4a6d284f7b85de7feefd9e12a57a3382e953cd13f09208b480
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link leading to a known malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=street+fighter+3+android+apk+free', which is presented as a lure for a game download. This suggests the primary attack pattern is to redirect the user to malicious infrastructure.

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=street+fighter+3+android+apk+free In PDF document text
    • http://files.sbpom.org/uploads/1/3/0/8/130813841/nujejebuwarorux.pdfIn PDF document text
    • http://files.greatimpressionsstaging.com/uploads/1/3/0/8/130874110/fivosimifafase.pdfIn PDF document text
    • http://mukona.bayareaflightinstruction.com/uploads/1/3/0/9/130969690/zakadogamov.pdfIn PDF document text
    • http://files.minecraftintheclassroom.com/uploads/1/3/1/6/131636988/8819793.pdfIn PDF document text
    • http://files.tryhardkitchen.com/uploads/1/3/1/4/131437977/2c85a.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/1/0434/5751/1590/files/gofesunabifexuxadupafib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/carbohydrates_importance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/47205083099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/pdf_reduce_size_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2401/5514/files/ffxiv_fashion_report_points.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3901/5580/files/27762391063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/42754125655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/zozag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4822 3624 bytes
SHA-256: 75ba77292a8478e96f5f15ead960bb1c49427c6a02e0d3c3cc225056f3d482ca
font_01_sfnt_off0000550b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x550B 5424 bytes
SHA-256: d63e875d02b1fb62c2bf0157ea420af0519c428fe6191d8f888a25a14e9125aa
font_02_sfnt_off00006772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 10276 bytes
SHA-256: 1927fae10fe4c680e8f3ed5d578d0a74186a99d828d6cbeb8e53709a1e619701

Open this report in the interactive analyzer, or submit your own file for analysis.