Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ae0a9ff718bfff…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 13:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a840f3c02915be6a19c71c3b2c29d9ba SHA-1: e6d2771b54c99bd5e6206bc64c2b691443789684 SHA-256: 65ae0a9ff718bfffce6026ca8fb3e93a0f9c7b2e8b6a7c861c659da547f15a67
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into clicking it for a supposed free download. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to malicious infrastructure via a link farm.

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=sociological+approach+literary+criticism+pdf In PDF document text
    • http://zapoboz.kevinogrady.com/uploads/1/3/0/7/130738720/2545931.pdfIn PDF document text
    • http://files.dartendistrict.com/uploads/1/3/1/8/131856381/jarukid.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/1/0428/9105/1161/files/24248109623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/jufazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/system_analysis_and_design_tutorial_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/89950573283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/degusunutape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/towa_no_kizuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/12555053349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5934/6582/files/89896268286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/sibivo.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_off00005fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 5776 bytes
SHA-256: 6b971f2f2dd4dc5f4cf93d28690f5059877c5c02d893001f2f2b3e7d45a27e70
font_01_sfnt_off0000731e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731E 9952 bytes
SHA-256: a05825ebf6a1e7746e517f19b857b10f383a9b344bc8eb3278d2ccf922540a7d

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