Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05481597303339b…

MALICIOUS

PDF

42.6 KB Created: 2020-09-06 00:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5f5e71e8e2e85a4fbe576388557418 SHA-1: 37a1db233603bb87503cce168976b4e8ebe25be3 SHA-256: e05481597303339b549990174fe2cb540959954a49f367b3926f9a93efbf9f78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=senior+capstone+project+pdf'. This indicates a phishing or malware distribution attempt. The document body also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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.link/wix?keyword=senior+capstone+project+pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/bivuvisamib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/the_o_ring_store.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/wavelet_transform_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/tituvazujubotetodomuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/wizenasiperorodob.pdf
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/20905020025.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/xcode_command_line_tools.pdf
    • https://cdn.shopify.com/s/files/1/0434/4928/6813/files/21155792578.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/kodisipiripokeniwasirepuw.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/6cfc61_e08644448dbf40b996ee99f8f2026ccd.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_51f37fdde7984bc09444fbe7ba59a6ef.pdf
    • https://static.usrfiles.com/ugd/76156b_25676c1fc8324fbf8e4558a047313912.pdf
    • https://static.usrfiles.com/ugd/a467d2_7a9eabb7a2d44a7ba3f1a217a615a75e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1821/3797/files/les_bacteries_anaerobies.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/lightning_protection_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/bopabixokapodugawer.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_off000068c0.bin
bc7e5477846630f84ff7a91736e3af51858bc8e88000c0acd88bdc49516944c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5296 bytes
font_01_sfnt_off00007ad8.bin
4ff6af9ab8cfce64d55303b88435309b9d466b73c9303e5a9370855d97bbad33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 10076 bytes

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