Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14a9f2a5e7e4f5b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 16:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8da2e007befc617f6c959996c67bd5 SHA-1: 08ac7dc04a2d7c5e64785bba426cbee8792788c0 SHA-256: d14a9f2a5e7e4f5b73aa4fd3d7835b9e903d490eb98c9b64f8ad9e395a7f9372
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to various external PDF files, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Effective leadership qualities pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The ML classifier also strongly indicated 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.cc/pify?keyword=effective+leadership+qualities+pdf
    • http://rojirizi.lesbiandiscussiongroup.com/uploads/1/3/0/8/130874038/wipojorodame.pdf
    • http://files.dragonflyproductions.net/uploads/1/3/1/3/131398541/nirimetijiz-wexiviridoxal-rawirivu.pdf
    • http://files.frontrangeautism.com/uploads/1/3/0/7/130740158/lijivalaxeti.pdf
    • http://files.mandmcattlecompany.com/uploads/1/3/0/8/130874316/4577673.pdf
    • http://rilomo.thepaincompanion.com/uploads/1/3/2/7/132712615/5a3b7.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/98364597541.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/judit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/givaxabofaboxusuloxeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/vowevuxofatofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/deep_stalker_ranger.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/39863069927.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/67511107208.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/libros_de_agnosticismo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/95934698294.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_off00006489.bin
4a19fb8730c5ff3f5b02eb4e14422ee220f6637c0e4cb029a3d61cbcc7d0d2e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 5384 bytes
font_01_sfnt_off000076d0.bin
cf8e6efac2c947c7dcc3cc2d16cb9ec2431190f259ee47fa3be9383ddbf78bf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 11144 bytes