Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c73e343e7344205…

MALICIOUS

PDF

44.0 KB Created: 2020-08-18 22:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67c87c1ccdc0da59546be02c9fb42fe7 SHA-1: 965653fbdc4e2752f18bc50498d63c0bcb2fa701 SHA-256: 7c73e343e7344205e085a928546d0e0e335a97873018c7b770d78cd05b589d1e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a link farm pointing to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise its true nature and lead users to malicious infrastructure.

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=lasagne+butternut+squash+sheets In PDF document text
    • http://files.teachhistoricalthinking.com/uploads/1/3/2/6/132681045/tukuremebosupapal.pdfIn PDF document text
    • http://files.acromios.eu/uploads/1/3/1/3/131383247/runuba-fegipuna-wejuwutu-porutuvojo.pdfIn PDF document text
    • http://files.ucsbaccounting.com/uploads/1/3/0/8/130813366/zokas.pdfIn PDF document text
    • http://files.connecticutghosthunter.com/uploads/1/3/1/0/131070398/9581459.pdfIn PDF document text
    • http://files.aa-gue.com/uploads/1/3/1/6/131607027/duzeligatamuxu.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/1/0433/0491/1006/files/8176844681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3012/6490/files/zoologia_del_phylum_arthropoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/check_point_certified_security_administrator_ccsa_r77._30.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/gajososorivuzanokun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/buying_personas_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/basel_iii_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/mavekesufelidugomifaziluk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/fuzokusetar.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_off00006d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 5120 bytes
SHA-256: 33b849e0f7539df09c4f93658021e5f056c04b2134afa579472e3aa591f37e03
font_01_sfnt_off00007ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDE 10580 bytes
SHA-256: d4c5c0ffccc6ff0c818cc0ceca6e8e3cb44d15fb2ea053d25ce547f603f3ee1f

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