Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dc05baec4a28d8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 08:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7ee7110d18d696100ee47faf1fee307c SHA-1: 330f219e9a06a69904f7145cf9f08a1e634ac5f4 SHA-256: 34dc05baec4a28d8996ea5ae739605cf926940d8fc04ccf2953f894d9e683e86
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.cc/pify?keyword=effortless+english+vip+lessons In PDF document text
    • http://taxes.n3vem.com/uploads/1/3/0/8/130813059/tovezolegi.pdfIn PDF document text
    • http://files.hgcoffeeshop.com/uploads/1/3/1/4/131408256/49cb1.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/1/0434/3293/5574/files/60874892858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/decode_base64_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/watch_wrestling_uno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/kokolagigesixafage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/atypical_3_temporada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1173/5705/files/14233332895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/iphone_5_launcher.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_off00006776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 4972 bytes
SHA-256: fefe9978b66e566762e3defdb1eae315b09003277a0dbd3cfc3507128f518198
font_01_sfnt_off0000786d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786D 10292 bytes
SHA-256: b0fef3cb4ff4e61d81a68434a8cfd76991db7d61523e8b423e48bdffe0c369fa