Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cfcacaf431a59b…

MALICIOUS

PDF

37.8 KB Created: 2020-08-12 21:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9fae58276b5fd20ba91fe4771db71bdc SHA-1: f13cbc905b57aa81cb442b5afe7c3fafa77d0a61 SHA-256: 93cfcacaf431a59b0ee6df6c8c76559022c9162ac9c62f839226c788f05974a3
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to ttraff.ru, indicating a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains the same deceptive title and URLs, reinforcing the lure. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=discrete%20structures%20of%20computer%20science%20levy%20pdf In PDF document text
    • http://files.dundasstudiotour.com/uploads/1/3/0/7/130739155/7600432.pdfIn PDF document text
    • http://jujaritu.overhauls.info/uploads/1/3/0/7/130738531/zilodij_diwokole_sizogivuben_ponikilixutinuv.pdfIn PDF document text
    • http://files.pahasapagrotto.com/uploads/1/3/1/0/131070313/3b5e1fe.pdfIn PDF document text
    • http://files.thebsquadproject.com/uploads/1/3/1/3/131383380/3928268.pdfIn PDF document text
    • http://files.lawnritechichester.co.uk/uploads/1/3/1/0/131070207/movowubobosed.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/1/0430/8575/8628/files/45521062341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/60516375719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/widizowinorusinurowewefut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/lumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/88275340676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/application_letter_writing_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/44926635281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/6017544040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3043/6247/files/75985762839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/46426620542.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 5

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_off000055f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F5 5252 bytes
SHA-256: 6983be88254c519f1ed51f8eee2e9163627401fb00651d538ae22b5ef65b7cdb
font_01_sfnt_off000067c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 10028 bytes
SHA-256: 3d36cbc3773f3cce4da28afdb0e7b40815782f2a0bd69871314c9435354d9ccd

Open this report in the interactive analyzer, or submit your own file for analysis.