Malicious PDF — malware analysis report

Static analysis result for SHA-256 612a2ebe6700b3cb…

MALICIOUS

PDF

54.3 KB Created: 2020-10-25 04:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: e5de8546c9b7294f02743eea7ee2bb0f SHA-1: 3e3ebbce97dee8f83e320d1c96daa74b6ad4fa97 SHA-256: 612a2ebe6700b3cb574a31ebb0d2449065f2f110df3456ce9b5e48296033d4b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to lead users to harmful websites.

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.me/aws?keyword=barium+meal+follow+through+procedure+pdf In PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/791bf9d83063e8.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/jumuvoxarima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f597dbe-1dfd-4bd8-ba98-3a60269fdf0b/21835460118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61f141f-d918-446c-a85a-ae8ae9ad844e/xufozerasibuxulozizudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0e12e6-8415-40e1-acba-85e9dde1cea9/adam_smith_aportes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9cef9d-a005-4004-b318-cef5a8e6035a/naginubufupowinezisanabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7583f689-9443-48cd-8bc6-38cecd230f47/brother_mfc_8890dw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0056b2b4-b783-4893-a915-e955a5fa15ec/retotowafurarura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82818a03-84ff-4168-9076-5c0aed9f0814/geneva_sound_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c1ba1e-6401-4182-ab7f-a78b81a1680e/93757933336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aadc07-74f3-45d8-b7ba-692a7bdaba28/2878163322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fda552-480b-4691-850e-d44abdf3f300/zovusaxutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/capital_x_bar_statistics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9235/4245/files/what_plants_talk_about_video_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/toreb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2795/3312/files/72121985137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/hypersonic_glide_vehicle.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/el_antimanual_de_filosofia.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/fair_administrative_action_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2274/8317/files/47686112771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1565/8401/files/58210665090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4070/6207/files/26917432789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6787/3701/files/strongest_sao_alicization_characters.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_off000092ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92EC 5532 bytes
SHA-256: 951e1c0381f34c52f0b9d21691a631eaa4151ed2ed9d853376923e45e7f3ee7a
font_01_sfnt_off0000a5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A7 11124 bytes
SHA-256: bbdc164447fa37191d6a4bba82cd9486b145644f62d936e9a6b27ebd416bd371

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