Malicious PDF — malware analysis report

Static analysis result for SHA-256 588ff665832b0cd4…

MALICIOUS

PDF

44.6 KB Created: 2020-10-25 07:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 93234f1632f34b2f7b1d6dd5ec556b64 SHA-1: 57839278cf75571af1ef2acac6923ba92c840819 SHA-256: 588ff665832b0cd4f0d6ba23f37c4f28aaa7e64506b743576f8989c4a82b4332
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.link/123?keyword=honda+eu+inverter+eu2020i+generator+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f90f12b79e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8aa1e3885b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87ec6090885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8aa160a519e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f93f9ee29461.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006ae6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006ae6.bin)
    • https://cdn.shopify.com/s/files/1/0492/3870/4284/files/king_street_primary_school_singleton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8538/8704/files/zinedegimofibafuguxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6978/7300/files/automotive_light_bulb_cross_reference_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3768/2585/files/teri_meri_kahani_mp3_wapking.in.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/machine_learning_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/gluconate_de_calcium_indication.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/79114585195.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/94701795661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/mount_pleasant_elementary_school_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/93549943228.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/57647066973.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/biomedical_waste_management_project.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/exercicios_resolvidos_sobre_distribuio_binomial.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/ctet_question_paper_2019_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/98167004387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8239/7879/files/1400126880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6047/3241/files/architecture_and_disjunction_google_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7578/2054/files/wexogupidobefepufunilipog.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_off00006ae6.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE6 5260 bytes
SHA-256: 048e2a73df230ecbe22aed69c2e289bd2a60c80e5e6c479ba763559db095c83c
font_01_sfnt_off00007cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 11544 bytes
SHA-256: c4cfcd214ba161751d9a4c6595becc759e9e7b5f51c3733436aa498e9e598156