Malicious PDF — malware analysis report

Static analysis result for SHA-256 449e2f22b2f721ce…

MALICIOUS

PDF

47.8 KB Created: 2020-07-30 11:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea2a804b323d487c77b3d18aa7359ca4 SHA-1: 681867bf66df5b7d9594edb2f028ad7a8333c22a SHA-256: 449e2f22b2f721ced06d4b58bc97a8d36ab893fdee92d007d7927cb060f2ff15
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=asynchronous+learning+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, suggests a theme of 'asynchronous learning' to disguise the malicious intent. 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=asynchronous+learning+pdf In PDF document text
    • http://files.bwmusic.net/uploads/1/3/1/3/131384383/1be4a9027cbd8a.pdfIn PDF document text
    • http://files.manufixed.com/uploads/1/3/1/3/131379496/7122752.pdfIn PDF document text
    • http://files.catledgeconcepts.com/uploads/1/3/0/9/130969896/pupejom_mesiwiditi_jakugatiwi_womajanudi.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/1/0434/1117/7639/files/wekowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/25882650018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/manonukobipuwujerulirus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/xatujaseguvuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/melotodan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4274/2167/files/mekexanoseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/94186093684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/kigalisasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/wuxuserorukofav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/jowalogalomepik.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 7

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_off00007e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0B 5308 bytes
SHA-256: 06ca13d4db7ed21e0baed73a20b74326e89ebe58103cd46ca7d1e175fb430e5d
font_01_sfnt_off00009009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9009 10040 bytes
SHA-256: a080600eba267f1fdca7e3f8349e1982bb32d14eec913ae8459753ccdc6fd749

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