Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a316738c676d261…

MALICIOUS

PDF

38.2 KB Created: 2020-08-18 17:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 887496d0939b02e6714d47cb30388079 SHA-1: a00465216dd3c0f481e8eeb4d6e75c7e6dee187d SHA-256: 6a316738c676d261c992aa30c10dd6f1adc5e0c54e46b9a721dce4af2bb4c11e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) known for malicious activity. The document body and embedded links suggest a lure for users to download further content, likely malicious. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-linked redirector URLs reinforces the malicious intent.

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=rewrite+the+stars+flute+sheet+music+free In PDF document text
    • http://gukaju.zhangtours.com/uploads/1/3/0/7/130775701/1608915.pdfIn PDF document text
    • http://files.allstarskaraoke.com/uploads/1/3/0/9/130969748/7215338.pdfIn PDF document text
    • http://files.anacostiagrows.org/uploads/1/3/1/1/131164081/5873327.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/1/0434/0744/2072/files/nutajonawikexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/mikrotik_access_point_configuration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/java_offline_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/kiwoketi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/tesla_model_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5493/7765/files/revoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/9479575143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/betavuxusikokokadoduf.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 6

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_off00004fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAE 5220 bytes
SHA-256: 0eedafd33fb3ef74d65a43cf34ff96f82bd25ab3db0a76e6467dc8a7754193e3
font_01_sfnt_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 13832 bytes
SHA-256: 4d1242af5d39f321844be4f60a2aeeecd77512a59ca5b2b549b80acea9ff7259

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