Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9388b9f858fa40b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 18:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7eef7a57a9af5db76b32bc8ab0ba7ba SHA-1: d486cedab0787caeb1a50070f3962a1c62573063 SHA-256: c9388b9f858fa40be4a6424a5f08f2443bbc55a128d0d9585faa4a12d423675a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=jsc+result+2018+marksheet+dhaka In PDF document text
    • http://tiguvona.ecoadventuresbarbados.com/uploads/1/3/1/4/131483255/fejuvasowo-wujajobewiw.pdfIn PDF document text
    • http://files.natalieteale.com/uploads/1/3/2/6/132695915/sijowuxuvawok-mugox.pdfIn PDF document text
    • http://soruzewi.nebraskatraileroutlet.com/uploads/1/3/1/0/131070374/d3642c94d170269.pdfIn PDF document text
    • http://files.coastalaquariums.com/uploads/1/3/1/3/131381772/49ac8423af.pdfIn PDF document text
    • http://gaxib.ilovesmiley.com/uploads/1/3/0/8/130813420/fituxalupimegazeru.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/1/0438/5511/8501/files/lixivufuzibagajifudulanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/80023845307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2358/9788/files/lamoxebipalenexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/balance_sheet_vs_income_statement_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/78714426657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/catalogo_pompe_caprari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/ethical_issues_in_journalism_and_the_media.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/antioxidant_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/madijelinuvakij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/windsor_ct_see_click_fix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/53463286681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/sapibat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/signs_and_symptoms_of_skin_cancer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 5752 bytes
SHA-256: 06b2d1223df4b293ef6df76414644c7a11793814d8d8170881177b70d115d66c
font_01_sfnt_off0000888f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888F 10304 bytes
SHA-256: 0a98b7866814563346a7b90ea3c956ae05e2f5e32bfe06859e5c99e1c3838d8a