Malicious PDF — malware analysis report

Static analysis result for SHA-256 842a97450eefa31f…

MALICIOUS

PDF

65.3 KB Created: 2020-08-09 14:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6e2618888d2ec3a16ef8c80b1fe34f5 SHA-1: 6aef7bb0181ca3ea2bfd9e07e4967571b3fb3554 SHA-256: 842a97450eefa31fa379b51c2e6b4c9aa7c3647de5e765708a75c3e766ff0bbb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to a redirector service known for malicious activity. The primary redirector URL, 'https://ttraff.ru/pify?keyword=new+technology+in+construction+pdf', is flagged as malicious and associated with SEO link farms, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

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=new+technology+in+construction+pdf In PDF document text
    • http://botut.yvonneblack.com/uploads/1/3/1/1/131164250/gubibiv_zulofasebukipi_tutejadokup.pdfIn PDF document text
    • http://files.theelephantstudio.com/uploads/1/3/1/4/131453465/2b082a24899c84.pdfIn PDF document text
    • http://files.mendocinosportsclub.com/uploads/1/3/2/8/132815924/89985.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/1/0428/3046/3142/files/37245554089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/ashtalakshmi_stotram_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/pazawamolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/keduwelojolepeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/nilitizofuwitumutowuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/data_warehouse_lifecycle_toolkit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/pubulekurimanam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/carburetor_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/bosch_automotive_handbook_29th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/74085470189.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_off0000c3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DB 5368 bytes
SHA-256: fda565d6c2e600a4eb19c6cadd5b0dc0710ce2f49e0f605ef186d1e8e0424d0b
font_01_sfnt_off0000d640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 9872 bytes
SHA-256: 3d5bff6cf7d54d2fa00815bda694df66b83ba7170870e0d2885b1603c59e2630

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