Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79addac3f9cf7f2…

MALICIOUS

PDF

56.0 KB Created: 2020-08-04 04:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae0a150625139e83644b41d1fef39d0b SHA-1: a21a4d052e6683cf5df0d5e93d0f156c5a0e8052 SHA-256: f79addac3f9cf7f29bb20b549701a958282617c158ea99cd8e3370d0aa8a76a6
194 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which are hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=accelerated+learning+crash+course+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=accelerated+learning+crash+course+pdf In PDF document text
    • http://pisod.vanastracommunitycrc.org/uploads/1/3/1/0/131071243/fedasen_surafupopa_rutudazukit.pdfIn PDF document text
    • http://files.transformedforlifeuganda.com/uploads/1/3/1/3/131384335/68ed566ff6.pdfIn PDF document text
    • http://files.jordanjclark.com/uploads/1/3/1/4/131407424/fezidov.pdfIn PDF document text
    • http://files.partscare.aero/uploads/1/3/0/9/130969498/zizig.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/1/0428/7466/7164/files/kafeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/60039921804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/1514989299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/ruwamaxexepan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/bupijuguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/pdf_max_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/demon_slayer_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/paxufezusagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/fowufira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/juzevetimisaz.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_off00009f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6B 5408 bytes
SHA-256: f662e61795276031c8788008e4535846d9399a7a2bcec18df630293bd7a5ab6c
font_01_sfnt_off0000b1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CA 9724 bytes
SHA-256: 5f561b33dfc5330b0cf8b9b04417ff4bdf0e0165a44a7e33d730bd91938aa74f

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