Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe8eafabbd446f8…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 21:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 323df7827cceae06dd072d2085cddfbd SHA-1: 5bbba1a61f221040ae869d2261747d55a25a6344 SHA-256: efe8eafabbd446f81662cefd50ce983fdb8c591e208ff2ebd3c4560e22746279
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to click this link, likely for a phishing or malware distribution purpose.

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.com/pify?keyword=differences+between+meiosis+and+mitosis+pdf
    • http://files.scarecon.org/uploads/1/3/0/8/130874566/29647e00ca1c2be.pdf
    • http://files.icecreamstones.org/uploads/1/3/2/8/132814518/sodaw-geviwufabujemud-vobove-tabut.pdf
    • http://vutijiv.campmather.org/uploads/1/3/0/7/130775214/897860.pdf
    • http://files.fatcatproductions.com/uploads/1/3/0/7/130776483/pimovakakepukexudu.pdf
    • http://files.orillia-arts-village.org/uploads/1/3/1/0/131070912/8332147.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/986857005.pdf
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/bootstrap_table_css.pdf
    • https://cdn.shopify.com/s/files/1/0435/7193/7441/files/ccna_module_1_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/sim_2_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0447/9172/6240/files/hourly_schedule_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/14042088943.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1615/files/supply_chain_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/dipegopulumonejuwof.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/xisuvimazibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/linux_commands_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.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_off00006d5c.bin
2254fd379af5896e73de894471b5f979c6f3f88852caf8925a801e4785dff1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5C 5500 bytes
font_01_sfnt_off00008004.bin
c4413ad8676ebe10c05cf23073cde91871d5f5e5df88af399fff5623a22f8768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10264 bytes

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