Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4847577012b167c…

MALICIOUS

PDF

39.8 KB Created: 2020-11-02 22:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc42800674d12d8dcf0be00919af6aca SHA-1: 274636179d806011a82f54f37ff5bee8ed0ba8e9 SHA-256: c4847577012b167cc8121ced01efd7a6dfef920544276be83442c0e59d6af70c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, with a critical heuristic firing indicating it's a redirector link to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to direct users to potentially harmful content or phishing sites.

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.club/123?keyword=go+dog+go+dr+seuss+pdf
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/4492772.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/xixaparunixigoz_fokasisatetiful_lujeloralugomuf_jipowovogoz.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/safonubupipu.pdf
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/rajal.pdf
    • https://cdn-cms.f-static.net/uploads/4401559/normal_5f91af7db12ce.pdf
    • https://bubudatitiga.weebly.com/uploads/1/3/4/3/134308982/luximezojepu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/047c836b-7705-4b69-8a7b-ee15930844de/tim_ferriss_book_club.pdf
    • https://uploads.strikinglycdn.com/files/41d5feae-c0a2-4680-b83f-20f81b3f91ac/telusitafa.pdf
    • https://s3.amazonaws.com/tedowafomaru/astaghfar_ki_fazilat.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3652/files/algebra_1_chapter_6_cumulative_review_answers.pdf
    • https://s3.amazonaws.com/mesixadelomomo/66237963468.pdf
    • https://uploads.strikinglycdn.com/files/2bff4297-6e65-4c6a-9407-03686ab5d29c/terraria_how_to_make_mushroom_biome.pdf
    • https://uploads.strikinglycdn.com/files/d39ad977-7db2-47ab-94b3-48693ff34306/17244299951.pdf
    • https://uploads.strikinglycdn.com/files/dbd22a07-f6b2-4a2c-9ffa-c7311727fd40/77707762531.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d0f.bin
bb80f66bb0e77dfcaad951d9445764f3ab8d4eaec38fdfe0c0eeb8c1c34a3844
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0F 5000 bytes
font_01_sfnt_off00006e2e.bin
a02570d19de089931e79bdd21ade83eeea824b1952366a7cf66748f8dc855b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 10676 bytes