Malicious PDF — malware analysis report

Static analysis result for SHA-256 986c455e42db9672…

MALICIOUS

PDF

44.4 KB Created: 2020-10-25 08:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 3c979012a26930ea377024b16dc5c615 SHA-1: b3be0eaa892dea9c968b1c30714e16e14b2735ca SHA-256: 986c455e42db967259e6dc2aef7800833f017ac9a34d6ed9c868b38b5be4d86a
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=score+hero+hack+apk+techylist In PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/retutukesejurabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8a411d078c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8d9b0bb2492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f94281f240cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f94da4a6038c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f908c7b724f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006f7e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006f7e.bin)
    • https://s3.amazonaws.com/zetare/cameroonian_dishes_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/grammar_english_language.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/psu_books_for_computer_science.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/uncle_tom_s_cabin_chapter_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/fupotuduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0976/8086/files/autumn_in_new_york_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/8381437122.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/ca_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/3255981940.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/security_guard_training_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/soal_dan_pembahasan_aritmatika_sosial.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 extracted file (font_00_sfnt_off00006f7e.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7E 5288 bytes
SHA-256: 399d0f6dbb1b7017accbae239e3e4fa72105cc9a47b6b924e3d5933ce7d3fcab
font_01_sfnt_off0000817e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817E 10216 bytes
SHA-256: 3c5a98984085373ca81515db08fe4445766d6c1ca8acd98a0e401bf1331fe3b8

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