Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede9bbea04105f03…

MALICIOUS

PDF

42.1 KB Created: 2020-10-29 05:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 105114cc8f9df8fd83a633a3c1eae123 SHA-1: efb5a68e164980161797db3c8a7b99bb361d1e68 SHA-256: ede9bbea04105f03b805a4ac0b9d561ba6e256bf4883811024bad9533a3bf383
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and redirects to a URL associated with known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, includes the target URL and keywords related to academic topics, reinforcing the lure. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links points to an SEO poisoning or link farm strategy.

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://cctraff.ru/123?keyword=graduate+school+project+topics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f8fc14560879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f93780f1881b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f94595b828dc.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/5558302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f95c9b7176d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f8d7c3515c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5f971d11213f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f8fe89b4dd3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8f7413e07b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f8cce2919cc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8d3c838f898.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/1/0482/4268/8154/files/2nd_line_app_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1750/9274/files/berlinde_de_bruyckere_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3055/6053/files/flash_video_downloader_android_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9177/8454/files/tera_mystic_healing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1688/0281/files/16497818864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7134/3266/files/21816023465.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_off000065dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DD 5268 bytes
SHA-256: 3ff52bb97d0c54598eb053605e9d0284f5f9542f2df384d876a9a54906d534dd
font_01_sfnt_off000077c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 10540 bytes
SHA-256: 39be378d95a96daffea63bcc68e4e296bf8a0932fc58ee4c8179196871f04cf5

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