Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ababcb8a0d297a…

MALICIOUS

PDF

48.1 KB Created: 2020-08-22 23:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a06366ee4b7ae3d9adc27aaa0f35f453 SHA-1: 8042b07c7ac1f2581865b430a7ad69b5750e7e4b SHA-256: 60ababcb8a0d297ad8a50f22e55c83b0161871dac982c1d0ea87fe21cf12f160
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. Crucially, the document body contains instructions that mimic social engineering lures like ClickFix, instructing the user to copy and paste content into a terminal, likely to execute a malicious command. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=android+studio+debug+signing+certificate+sha-+1', is flagged as a malicious redirector, indicating it's part of a malicious chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=android+studio+debug+signing+certificate+sha-+1
    • http://zusunan.plasticbeadsusa.com/uploads/1/3/1/8/131858530/ditasafizezu-rapirofelim-woxidovexa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/29335892414.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/xajogojez.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/96951510763.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/bokirixobepakusawop.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/exercice_verbe_etre_et_avoir_au_futur.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/57264984909.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/the_search_for_lost_time.pdf
    • https://cdn.shopify.com/s/files/1/0452/4412/1248/files/tabela_simples_nacional_industria_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/36833469546.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/analytical_methods_in_chemistry.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_off00006c30.bin
910477b168b00f1d54a221bb7176aa94749b6d0be89855fd345b61d5d42fdb4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C30 5348 bytes
font_01_sfnt_off00007e5f.bin
5868c1bfc8b35989fbc64e76b8991b599ff2246d44dc403f11c20b2afc90fe53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 11840 bytes
font_02_sfnt_off0000a54b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA54B 4324 bytes

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