Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb04f458c8335e4…

MALICIOUS

PDF

34.9 KB Created: 2020-08-16 21:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26964c5513e9d1cded04ed357b2bbe54 SHA-1: 76c07ea76cd34e5de5c2c2f22dba267fc0af304f SHA-256: aeb04f458c8335e46ad384c5fb755d509176c149e9d6c98a5ebfe63c89f7ea4b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to lure users to click on what appears to be a research paper. The primary malicious link, 'https://ttraff.ru/pify?keyword=fisher+statistical+methods+for+research+workers+pdf', redirects to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links supports a phishing or redirection attack pattern.

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=fisher+statistical+methods+for+research+workers+pdf In PDF document text
    • http://tejamime.faubionchoir.com/uploads/1/3/2/8/132814930/fixajowixaxapufinuxu.pdfIn PDF document text
    • http://files.koalasboutique.net/uploads/1/3/1/4/131409024/7473783.pdfIn PDF document text
    • http://files.classof68organization.com/uploads/1/3/1/8/131871622/fb2adc.pdfIn PDF document text
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.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/1/0431/4837/8280/files/wenalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/dark_souls_3_mage_build_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/zobawopivedokofiguberi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/poemas_de_amor_alfonsina_storni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7870/3518/files/91274756625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/fufojirulid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/41177822232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/46994286372.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_off00004961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4961 5508 bytes
SHA-256: 61f2abaa5b839be744810cab1ca5ba40633da6ddb8c8ceac3da9358ea23779e1
font_01_sfnt_off00005c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0B 10112 bytes
SHA-256: 036db8d50225f1ad1db08606f26725ad99b4b6232cba043da380daf0daa46a57

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