Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbdf69aa1adf415…

MALICIOUS

PDF

40.5 KB Created: 2020-09-06 00:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 891010f82952762c287fb820b1305a2d SHA-1: ddffb24d27910a79f9b5b978c473793d68c7da3b SHA-256: 5bbdf69aa1adf415912548f8b718168f61ef911125d0ccc9c38f961b85013131
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body also contains numerous links to Shopify, likely part of a link farm to improve SEO for the malicious redirector. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=formal+email+to+professor+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/94772170390.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/eclipse_oxygen_3_64_bit_zip.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/bomupisuvifobofafabowabuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/27714611564.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/how_to_clean_heavily_soiled_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0463/2723/4722/files/warowumisazukunuvo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/taylor_swift_ronan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/how_to_uninstall_technic_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0435/3025/6536/files/alkane_alkene_alkyne_table.pdf
    • https://cdn.shopify.com/s/files/1/0432/6594/9862/files/promissory_note_sample.pdf
    • https://static.usrfiles.com/ugd/b85eb0_d1d2cc966a88406b8eaf836209ff9d73.pdf
    • https://static.usrfiles.com/ugd/3794ad_ac08334364c5420190b63a60d39f2de0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9027fea6f8a499489be792004840909.pdf
    • https://static.usrfiles.com/ugd/e80f4c_9be0929c42564466a2c610ed5dd296e5.pdf
    • https://static.usrfiles.com/ugd/25c42e_fd9eb3910de74e1a8f5915260f6d58f5.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_off000061c4.bin
1d0228151826355c3c718423a23141147b78af4d0aa0f2fdf63b24c372e64846
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 5000 bytes
font_01_sfnt_off000072ae.bin
c3a9cbd3736be34b2fce2d0cd48bc8f7153ed4fd5e4a92b74f3023d2fd43c53f
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AE 10148 bytes