Malicious PDF — malware analysis report

Static analysis result for SHA-256 9517c2c5924ca88b…

MALICIOUS

PDF

54.3 KB Created: 2020-10-26 18:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 95b7e4269879fbbb0553ec4d53574809 SHA-1: ea1a6b91863476b3ce5afa7514aae90739b2a3f9 SHA-256: 9517c2c5924ca88be7cd2e11b72364a1187587fcb2376da1827549fd4188577f
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 0.9999

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.club/123?keyword=fortinet+firewall+200e+configuration+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f92a2c93d6d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f8e0937b410f.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/1/0486/5779/3192/files/ellington_public_schools_rating.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6317/1485/files/magopofokedilovede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7513/4130/files/anonytun_8.8_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9661/4079/files/16114872581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9604/2398/files/subtraction_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/50637985859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/proses_terjadinya_kehamilan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9253/3155/files/ruger_blackhawk_elite_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0775/1838/files/71729679349.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/analysis_of_variance_in_regression.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/assessable_spouse_election_form.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/78459750050.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/alister_mcgrath_theology_the_basics_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/afcat_2017_question_paper_with_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb2fbcc-0a14-46d1-8d4f-bfcbf37e456a/44976759668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0d71dd-b6f0-4de2-9510-3332bfb3b479/manosirabeduxinovonujurok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a205d2f6-f70e-4f92-922f-c08e1b14ecab/73074327157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363a19b6-b61a-4fb0-9dde-0aaad7942b6c/32117461380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ea1798-da18-441b-bfa3-0a1b5fa885cb/auguste_comte_cours_de_philosophie_positive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37af1e8b-5407-42d9-a90d-821cddef7879/bottines_plateforme_cuir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ef2f61-1396-4717-b2a1-b2b66c99ae27/45946848289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306521ba-a57b-436e-8d65-5f050b0d8033/51505921929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaf996e-3afe-4964-9b27-6feb3cf3306a/vizaxugusofefed.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000899c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x899C 10176 bytes
SHA-256: 084a4dd012121e7823bc0505c13ab22a260edd09983c39d2d3ec5642c48f5719
font_00_sfnt_off000068f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F1 4064 bytes
SHA-256: 5ec1d45651bb4b3e76811f6f9d57d7a1f26fba11fff50b3875fced77b10cf260
font_01_sfnt_off00007766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 5332 bytes
SHA-256: 91a6448f04ff4f37b14645796fe6194cd7ea18ef73fa160f8cd85db194f6d7a7
font_03_sfnt_off0000a61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA61A 10680 bytes
SHA-256: f27e8541b207162d67ac4f2fded343db50a82da1d7d00dc6ae699e67e985db28