Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e1810451d35826…

MALICIOUS

PDF

47.5 KB Created: 2020-09-02 04:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1ee56897e0cfc39ce259acfb833ca93 SHA-1: 16d27972894c25450403060f3a502631efc9d6b9 SHA-256: 48e1810451d35826b7d44a5613f1fe7bcae32b358ce1e7519cbdeaa57a17cd75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to obscure malicious destinations. The primary malicious URL identified is https://ttraff.ru/wix?keyword=tell+me+about+yourself+mba+sample+answer, which is a known malicious redirector.

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.ru/wix?keyword=tell+me+about+yourself+mba+sample+answer
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/merge_repositories_github.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6375/files/calendario_f1_2019_horarios_argentina.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/bhagavad_gita_chapter_14_slokas_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0460/1869/1239/files/75889943627.pdf
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/movimiento_rectilineo_uniforme_definicion.pdf
    • https://static.usrfiles.com/ugd/d17951_8c6d457d3cff453aa7fe0740951a89d0.pdf
    • https://static.usrfiles.com/ugd/db93e9_7e75f94c75b942c98a6179a559dfbe59.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b4e67165c1340dc9c99ea615bc83a72.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e8b102048c4dca9b8bdb9a244ef5ac.pdf
    • https://static.usrfiles.com/ugd/4bb894_633cf53d4a2f42b89f68723c8580a63f.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/catamaran_rx_prior_auth_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/jukodidosojikifakuzavag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/one_piece_bounty_rush_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6594/files/swot_analysis_of_pepsico.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/bruhn_analysis_and_design_of_flight_vehicle_structures.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b6c.bin
43f7f43ade5004a97f8c6c583bb0eb129a2b620306d25d83c5a59c3c18ef2e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 5332 bytes
font_01_sfnt_off00008d82.bin
f9b228c3de633aa9943b88523ba67b36f158391e60d3e9859a061e081a053e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D82 10512 bytes

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