Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d3a02090aad1fb…

MALICIOUS

PDF

49.1 KB Created: 2020-10-24 15:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 976203fd29fabd5bcb6b840d08916343 SHA-1: 59f090282e7badfe9aa708a5971db663ce5b48c3 SHA-256: 08d3a02090aad1fb23e7125ab9a813cef72d4d43c2da20030a878532a9674ff0
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=ifrs+framework+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f88bbd59f415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5f907b85c39b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f892bb56017a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f8a870d3a0ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f88a0c06dbf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5f8d31b823ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f87fb29d4298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f8fbcb727e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f86f85e5fd3d.pdfIn PDF document text
    • http://www.opentle.orgIn 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/1/0432/0700/0219/files/no_internet_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9675/0746/files/5110758195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6302/3013/files/write_my_name_in_cursive_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1979/2294/files/22248157342.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/causes_and_effects_of_unemployment_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/sotejiwebarovezufonikujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1404fb-b377-4f76-82eb-37e4c2dc5391/52505345775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adea36d-f02f-4224-87e6-ee393cbafabc/fexotunurad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e38c0e6-d66f-4221-b40b-6109271e1f3b/kupeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57fa9d0-9743-4659-9669-2fd4a3e3da5f/31230897851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe00ea9b-7980-44b9-a0f7-d2f348788f8c/jodogemorekajes.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/romoruguxilonatavoru.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/wezowefesinabejabi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/il_bacio_luigi_arditi.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/adestramento_de_ces.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/catalogos_avon_campaa_15_2018.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006930.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6930 15284 bytes
SHA-256: 05bcad1dae1b2e2158552f031c22e4b2ff6b175a2faa93cdb18c0d6d49a6dd89
font_00_sfnt_off00005677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5677 5520 bytes
SHA-256: 125dac7329b58966fd57972363d55d6840500b15a4f63760e444df5d77b012e7
font_02_sfnt_off000093cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 9508 bytes
SHA-256: 0334d9eaba8161f88a64fa322b68fd1838e165fe1834fa76894487f8a2120d24