Malicious PDF — malware analysis report

Static analysis result for SHA-256 12315117ec5e077b…

MALICIOUS

PDF

48.1 KB Created: 2020-10-27 14:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5170f8c86321c4d04a6392b18fe0c0a1 SHA-1: 7c7178cf9aab4ca1d61d547d62339659e77b8f85 SHA-256: 12315117ec5e077b439f771f88ae0f1d00c89baecbef0c32700b80d84c53368f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute further malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

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/123?keyword=dont+fence+me+in+lyrics+darla+hawn
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/sirowubojo_tinadizab_nejomisupano.pdf
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/dezubexomusexi.pdf
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/deniwaxeliburu.pdf
    • https://matubupediguja.weebly.com/uploads/1/3/4/1/134131452/5d95c5132.pdf
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/ridom.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/wuverobazab.pdf
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/tejerajamikif.pdf
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/wagaloker.pdf
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/dufofugomimod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/667ac18f-f250-4f5e-a1b0-0ba1d8a09382/renewable_energy_sources_question_bank_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/3225ad2c-6811-45a2-b10a-c26c2efe78da/demebasadowunobovidud.pdf
    • https://uploads.strikinglycdn.com/files/b4b1f7b2-3cd9-4d8b-beb8-bf38c0d9ed6c/43940365643.pdf
    • https://uploads.strikinglycdn.com/files/fd3e38c5-5611-4d13-9765-13f1df0e60b7/41357647316.pdf
    • https://uploads.strikinglycdn.com/files/253dbd35-3372-4f2e-aea1-1520b6755a83/jubunufit.pdf
    • https://uploads.strikinglycdn.com/files/665b1d8b-10ab-4a89-a24c-e7bc1ea97fbc/risuwupuwavem.pdf
    • https://uploads.strikinglycdn.com/files/30d365b2-39ed-4de3-9fcd-093c066f88c4/59265008614.pdf
    • https://uploads.strikinglycdn.com/files/17c2fecc-2c5e-4f95-a598-04cec998a0b3/65267734868.pdf
    • https://s3.amazonaws.com/kavitokolezub/41723726324.pdf
    • https://s3.amazonaws.com/xazarujokemus/ap_united_states_history_book.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/print_booklet_to_indesign.pdf
    • https://s3.amazonaws.com/wonoti/nudawipizel.pdf
    • https://s3.amazonaws.com/tetazino/bopefoxijusavutozaguxo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cba.bin
ec3f7043c6c19d2c7db342981e7cc326b905d11c372dcbe30dedecc51848a655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBA 4540 bytes
font_01_sfnt_off00007cd4.bin
bbe5804da0c16e4ca21b8b7cdeb58b868d89c9dc310e2442e262e62a0c9b88a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD4 5452 bytes
font_02_sfnt_off00008f4d.bin
42700d8ecd1878bcc2cba320d7d6447d31bfeb33dcd6c483636a8520e2d320db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4D 10368 bytes

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