Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f47797e9750fb7…

MALICIOUS

PDF

44.9 KB Created: 2020-10-29 07:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bc196f73aeb2f628b958e6012ece2e94 SHA-1: 3365b00fc93cbfe81937b71a5f1238f97272eebd SHA-256: 75f47797e9750fb74ee60b2b726159fe22df127220a297162f6d77bbdf9a6fb2
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://cctraff.ru/pify?keyword=achcham+yenbadhu+madamaiyada+full+movie+thiruttuvcd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f8df2271b7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f90de8d2bbc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006fbc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006fbc.bin)
    • https://cdn.shopify.com/s/files/1/0266/8573/5105/files/trig_function_derivatives.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/85283718967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/50535217864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ddbd7e1-c234-43d2-a4ee-85d9dd0bb5e9/god_of_war_ppsspp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/70036829730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/douchebag_life_unblocked_games_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f503dc47-e466-46e4-bc1a-8489b3c4843d/81538817227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5573/4167/files/12327456525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5389/3782/files/samsung_galaxy_s6_touchwiz_launcher_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/chemical_properties_of_nanomaterials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5533/5574/files/tom_sawyer_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/google_forms_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2844/7900/files/singing_game_apps_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e8e834-8d57-4b6e-9c55-20815ff40e68/rodrigue_et_chimene.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/blessings_laura_story_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdccd09-0688-4cda-9713-e66332642485/rekisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9574/7488/files/so2_covalent_or_ionic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/nvs_ldc_syllabus_2020.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_off00006fbc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBC 5372 bytes
SHA-256: 7d232db766f3534a81adf3831a4b66501eb29e98c9841ee82ace922828a70ded
font_01_sfnt_off000081ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 9904 bytes
SHA-256: a3050ce21f0056d3d00f98fcd0407705b11668d28cf1efacb1d100f409ff1d74