Malicious PDF — malware analysis report

Static analysis result for SHA-256 692de87bcb314b76…

MALICIOUS

PDF

53.7 KB Created: 2020-10-26 18:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c2d99298011ef55def34233ba8628c3f SHA-1: d7d314406c55a4021edf19f0f2f523cce8afe981 SHA-256: 692de87bcb314b7688f4fb09be59fcf6599fb1e108c41f03476a5dcf01e82dfa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/aws?keyword=definition+of+business+cycle+pdf In PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/turufun.pdfIn PDF document text
    • https://purowuma.weebly.com/uploads/1/3/4/4/134472698/b6946664.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/merituf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870cc9492b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f91a90fee4fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5f8f9f95a7065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5f9211643da86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f94314249e20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8717/9160/files/28677086736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8494/6850/files/osteoporosis_guideline__2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4961/9103/files/xemonetorumexirojakiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6635/9460/files/nod32_antivirus_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5303/8749/files/el_infierno_pelicula_completa_en_espaol_van_damme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c1b0d7-4b9a-45c5-b1df-5a59f2171930/fewev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93587de3-5771-4b4b-8d03-1b75bae95d4f/16308756141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9041a45-9e16-4392-bb09-772c0525af26/98671819556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a868f8ea-39a0-491d-bf3f-3dc65c9db4f2/5636712431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55468911-11c2-4d0a-a56b-acb1094e7806/37923433254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1f0d1c-f84e-4355-bebc-82570c69d6ec/11250269403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e54a496-b7b5-4d31-bd95-32ea1d5ce862/oracion_sangre_de_cristo_cubreme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112943c0-60e2-4763-9a52-ce347ab108f0/44879208081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b84d4eb-f1d8-4f6f-ac5d-c1a03627d978/tojimoreregef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a148f0f6-3023-4102-9835-b8e2b2e63485/elsword_elesis_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8951/3634/files/beyond_words_swami_satchidananda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/cursive_writing_practice_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2797/8167/files/lasobumuzipuv.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C2 5084 bytes
SHA-256: 6c0064f2d9ac11fd9bf5aad9068b3cd4d35c62737c8b77e1f86b73ca8a208125
font_01_sfnt_off00009423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9423 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_02_sfnt_off0000a403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA403 10784 bytes
SHA-256: 368227cb30f3d7b55fdefc5837656ba39cc3ba95ecf9104509841c8755b0bcb9