Malicious PDF — malware analysis report

Static analysis result for SHA-256 843e06014c54f912…

MALICIOUS

PDF

65.1 KB Created: 2020-10-26 17:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 41e38426f7287e79f9b1539ad6c7ae19 SHA-1: 9250e32b4cc57a0169872d1b1269fc642c94fac9 SHA-256: 843e06014c54f912e91505e83320e7b9f21a77fe4622f9e2b453a1842c092800
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm, ultimately leading to a malicious URL. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of multiple PDF links suggests a link farm strategy to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.me/123?keyword=cdc+influenza+outbreak+guidelines In PDF document text
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/cbf58.pdfIn PDF document text
    • https://muwidewosavuli.weebly.com/uploads/1/3/4/4/134435377/7072697.pdfIn PDF document text
    • https://funugunuxu.weebly.com/uploads/1/3/4/3/134384448/kunotirenukesew.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/lafimobuzilupilom.pdfIn PDF document text
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/jovajuko.pdfIn PDF document text
    • https://jajoteraluwem.weebly.com/uploads/1/3/4/1/134108878/1454959.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/memub.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/moxajoro.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/bibejiworo_sidiwota_wurap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f8f64667b7f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8759ff11df7.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/1/0479/2474/0252/files/sovuvikuzepotef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2888/7714/files/91425347793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/91356297276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3336/4133/files/41336617613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8109/7904/files/mise__jour_android_samsung_s4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4960/6040/files/definition_of_cooperative_by_different_authors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/puzaxodumosazapamonubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/rezose.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_off0000c002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC002 5348 bytes
SHA-256: 406f4c8d88558909c3187207c6b14a3ea6c10bd0ec279d7f8c8aec2ccaf49ae3
font_01_sfnt_off0000d242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD242 10788 bytes
SHA-256: 06f0cd951db154363aa35a7b348b546334bfe15af29e4b88aff630118cc5dec7