Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9648eccaae01656…

MALICIOUS

PDF

42.7 KB Created: 2020-10-30 18:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: fb602d6c72f2511acbe4035b3d8a7951 SHA-1: 478792612ce6ee4147eaed7ad870e2512df40aca SHA-256: a9648eccaae01656a980af136adc0dfe189b780f509acd59511a8cac7f904e76
194 Risk Score

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.me/123?keyword=nose+job+before+after+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f87664c4cd04.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/megazijupak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5f95737ce661d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5f94c0a31cab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8bc4b5e69fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towakog/modern_strike_online_gold_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/disotasuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/0316/3813/files/63292631959.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/projector_buying_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/icse_class_9_biology_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/burekeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8600/2359/files/demafomuveja.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_off00006916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6916 5052 bytes
SHA-256: 066b9eaaf07eb8dcdfc42c5f2f9faada12a9372d9e1fc3efc780c022f3f6c30d
font_01_sfnt_off00007a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A54 10324 bytes
SHA-256: 268825e38d9c0419f07c6e930964d730e98d5390116d1539272fd4c6054faf2e