Malicious PDF — malware analysis report

Static analysis result for SHA-256 678605b2ea8d6166…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 17:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc4fc350cae6a6d33a481b8a3982898c SHA-1: 47298ff003f0e82cf5e5685685b75781448b10cc SHA-256: 678605b2ea8d61660001091851a5eb9b626e166e6ee6379b30acee206348bd8b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Adaptation in plants class 4 worksheet' and includes the malicious URL, suggesting a lure to download potentially harmful content. The ML classifier strongly indicates 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=adaptation+in+plants+class+4+worksheet In PDF document text
    • http://files.cdconggiaovietnamvic.org/uploads/1/3/1/4/131483201/vujomefu-sejok-nojur-vagomev.pdfIn PDF document text
    • http://defijede.advancedmedphysics.com/uploads/1/3/0/7/130775388/zovusemajodededunes.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/1/0432/0326/4667/files/mixojimuwelugalimumob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/29682003793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/omr_answer_sheet_150_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/stardew_travelling_cart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/fupefogudibesarixase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/cataloging_handbook_h6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/wugaravokunojugogipovanaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/woduxubafaxuredefat.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_off00005f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 5392 bytes
SHA-256: 66e467573b0ea63c689b85f0f3449c03edfcf5f613e10e834dfdc565f8bb5d26
font_01_sfnt_off000071d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 10132 bytes
SHA-256: e99b3ae3fda04e6dfb9f64c04c67368d008ec9560b4664c56b03d7475980ddef

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