Malicious PDF — malware analysis report

Static analysis result for SHA-256 282704e20a3ee737…

MALICIOUS

PDF

61.9 KB Created: 2020-10-19 10:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c58a99fb23882021aee743c8b092fbb5 SHA-1: 36baabd85df67bedf53bbf88cf5422177d703984 SHA-256: 282704e20a3ee737a9419d8aa0287a3863409260615c5470fc8d02db3b0e4f18
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/123?keyword=scotsman+ice+machine+user+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to download further content or visit a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=scotsman+ice+machine+user+manual
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/muzumopujubiwod_kemolalavobe_daxudi_rutexigejor.pdf
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/5803171.pdf
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/3437590.pdf
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/nobiwiwexozo.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdf
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f8b508e40ea8.pdf
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f8c884072fdb.pdf
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f872e1d53ff2.pdf
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f88665e0e4de.pdf
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5f8aa387da998.pdf
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/fbc3be7e6559a5e.pdf
    • https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/beveji-fufogomubemap-peribogafuxifu-nerivul.pdf
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/manual_de_usuario_refrigerador_frigidaire.pdf
    • https://cdn.shopify.com/s/files/1/0501/8232/4379/files/dnd_languages_5e.pdf
    • https://cdn.shopify.com/s/files/1/0496/0351/0421/files/half_life_2_episode_2_walkthrough_car_bridge.pdf
    • https://cdn.shopify.com/s/files/1/0487/0507/7398/files/vendredi_ou_la_vie_sauvage_complet_folio_junior.pdf
    • https://uploads.strikinglycdn.com/files/02fa187a-9d5d-47f5-a909-a038d371c480/xatumopegevot.pdf
    • https://uploads.strikinglycdn.com/files/5182e14e-f04f-4b3b-b4ee-874431b45ad0/fagozimumilimab.pdf
    • https://uploads.strikinglycdn.com/files/76858b87-7e4d-4445-99da-d00cb3acac38/98643474947.pdf
    • https://uploads.strikinglycdn.com/files/b4c2ef2b-0061-4e09-a7d8-dcf81ee0babd/40200999853.pdf
    • https://uploads.strikinglycdn.com/files/76e339ff-07e2-4ebe-a0ce-018f9add1635/91084835861.pdf
    • https://uploads.strikinglycdn.com/files/0c6f641b-a6f8-4b50-946e-f605ea584acc/kodekewuxisud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://uploads.strikinglycdn.com/files/76

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a66a.bin
3376d4eef2afb9bffb5c526d6f4626aeb642e1567855efe3f3f339aa0b01456f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA66A 5024 bytes
font_01_sfnt_off0000b733.bin
4055c2a6d788dadcf2558022a965995c80101cf81c0543465da43b90bcbe97c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB733 10652 bytes
font_02_sfnt_off0000db8d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 4324 bytes

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