Malicious PDF — malware analysis report

Static analysis result for SHA-256 90af507153510aa2…

MALICIOUS

PDF

48.0 KB Created: 2020-08-08 12:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0a330e434b4259f66f76915f2d860eb SHA-1: 5f7ce9c7e050ae52391822c75fcfd40d8133c4f7 SHA-256: 90af507153510aa2b7c68f97f91a12eceee5a671de713417011d9f688c8bcca5
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) which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL. This suggests a phishing or scam attempt, likely using a link farm to distribute malicious content. The presence of embedded URLs and the ML classifier strongly indicate 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=zero+article+grammar+pdf In PDF document text
    • http://files.alicehorn.com/uploads/1/3/1/4/131452942/gebidupewenuno.pdfIn PDF document text
    • http://files.pacificcountycovid19.com/uploads/1/3/0/7/130738719/vemefitij_ziwojitaj_zigelo_rasuw.pdfIn PDF document text
    • http://potafa.earlyeducationfdcscheme.com/uploads/1/3/1/3/131383297/matiziboturu.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/1/0430/9496/6436/files/83552765900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/zedezojasuxivalinodegemuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/www_alc_co_jo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/43581252485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/fusakuwejijib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/simanewuroruraboresun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/17610480771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/the_fantastic_adventures_of_unico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/draconic_energy_i_o_crystal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/fukoranivotamon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/xevuzodisisubuwikale.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 4

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_off00007dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD3 5252 bytes
SHA-256: aea675c819d7ed9495b2849539b89741b698856496f9890faee3713487c31c61
font_01_sfnt_off00008fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA0 10300 bytes
SHA-256: 487d14e77fe6635af7bffe62dd47fe8c1e320a4720d93356eec41425989095b7

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