Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbbbd192c2f6c2d…

MALICIOUS

PDF

43.1 KB Created: 2020-10-17 01:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b4a34b6e26d4a1b659ee57fdd8ec7772 SHA-1: 463795627fba968b213e7d34c7dc990ee27c56a7 SHA-256: adbbbd192c2f6c2ddd7acf958e3eaa4f235051bd696847c05ee4a7b28f81adb9
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=triangle+sum+properties+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f88a971443f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8729949dc3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f8975b0827f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f8a0b38b3497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f89809063759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8735fced758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f8882840656d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f89abaf108be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8759f6eb261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f8a13e2702f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f89640bcda80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f87c09f79cb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f88079fcc052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f879f5f80959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f8a15455eb0e.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/1/0432/7886/0454/files/vidonurivakakukigiwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/wenipapitajewamudul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/planeacion_didactica_uvm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/8236806044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/asan_arabic_grammar_in_urdu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8397/9688/files/how_to_make_iron_trapdoor_stay_up.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/pavilions_at_pantano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/mortal_kombat_x.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_off00006afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFA 5340 bytes
SHA-256: 1d1eebd5b1b55be3ae15189236dde1fadaa272f3f292abf33169322d37b1da42
font_01_sfnt_off00007d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D09 10116 bytes
SHA-256: 49ecb013002260409dcb6f32395834b1d291cbc54112f231ed954d864e82bf7b

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