Malicious PDF — malware analysis report

Static analysis result for SHA-256 1715c6b6ca3df157…

MALICIOUS

PDF

43.7 KB Created: 2020-09-04 23:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ebb08fbd7fe5c6ca504b0cd7afc380e SHA-1: 3f4399b30f406e0feb6143ab16439880211a3cee SHA-256: 1715c6b6ca3df15724eed4fdf3398a3147e8f81046117ab02173923e5ef4aa13
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search result, which is a common social engineering tactic to trick users into visiting malicious websites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary link leads to known malicious infrastructure. The PDF also contains a large number of external links, suggesting it's part of a link farm.

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=black+and+white+70s+platform+shoes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/35416774371.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5104/files/sunafawaforenisiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/buderus_gb132_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4487/files/dreamboxedit_para_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/dracula_oxford_bookworms_download.pdf
    • https://static.usrfiles.com/ugd/bd1fc0_3a2e27eeee2c493984ba8a766052a864.pdf
    • https://static.usrfiles.com/ugd/a13bc2_75889d4bece6466ca4263f1f0fc9f222.pdf
    • https://static.usrfiles.com/ugd/b4609a_294f9d2b101248d4a41251ac2afac557.pdf
    • https://static.usrfiles.com/ugd/eda9ba_0307215c5e8847518dd2aac6c07c4829.pdf
    • https://static.usrfiles.com/ugd/b18e4d_4c9092f0a69640248c53bea36610f0ba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/1292888945.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/70512477517.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/darkness_reborn_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/hey_jude_piano_chords.pdf
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/comparing_fractions_and_decimals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/riesgos_psicosociales_tesis.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_off00006b4f.bin
126432130a995e8edafcb3cdf4debea9c4ac0843c9b47d71e2ec14e53f2482b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5824 bytes
font_01_sfnt_off00007f14.bin
9b7f400e8ee254194aad4244ccce5558ee06c710bcec94ce180910576d9b9ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 10080 bytes

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