Malicious PDF — malware analysis report

Static analysis result for SHA-256 b311a72e10ffff16…

MALICIOUS

PDF

43.9 KB Created: 2020-10-21 22:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 83ca449ede4ce1555167f3c3bbcfee3e SHA-1: 715ed8ee6ebe3ca860f18f697ae43117ad21efb0 SHA-256: b311a72e10ffff16f11b0ef270abec125dfe1419c24c3ffa499f49c377330e0f
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=principle+of+polyacrylamide+gel+electrophoresis+pdf In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8f938f262f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f89ea3d594bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8869e970324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8836b9827f2.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/1/0438/1225/7952/files/36915653771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/immersive_mode_manager_apk_paid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1748/6503/files/einthusan_malayalam_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6225/9623/files/zufazobegup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0596/8285/files/jakexazosumonidobubag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/13959255335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2438/2634/files/47685897479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2150/7997/files/tajofagiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/ruzofegulapezefijerab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9690/2294/files/41015180560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3513/9482/files/ombre_braiding_hair_colors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7626/3841/files/fomebuvatebevolufetadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4456/1319/files/la_signora_in_giallo_libri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8171/files/the_chimp_paradox_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2577/4245/files/hongos_en_las_uas.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/konenegipogiki.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/some_basic_concepts_of_chemistry_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/36186135467.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/physical_science_grade_11.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_off00006ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 5672 bytes
SHA-256: efae461da831ad0b3c2d91f7714b7c8c3e4db991f66066ee3cb8668c66bcbbde
font_01_sfnt_off00007dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 10560 bytes
SHA-256: 49db3bf83a4be0b53398e5cbeccf1aee2a5cef2b7b5712f14dc8ce4dd26c6e02

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