Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68d42ad7806ad30…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 09:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1073ed0e9db3d274564907161691ed SHA-1: 9a69e00bed76b49d94da0ac436dbeaa8d539a50c SHA-256: f68d42ad7806ad3005fbed8fffa3cadef982563ba227ea2aec9197ca1e9294fc
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), and another flagged the PDF as part of a link farm with many Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and a list of other URLs, reinforcing the link farm and redirection attack pattern.

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=java+projects+for+students+free
    • http://pejefa.achievewe.org/uploads/1/3/2/7/132740930/rogebapinatibo_bodebumirodi.pdf
    • http://nojapos.jayrographics.com/uploads/1/3/0/7/130775982/mafesefotijurupokaj.pdf
    • http://devedime.pesfusd.com/uploads/1/3/1/4/131482916/9602127.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/matricom_g-_pad_bx.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/67296243257.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/vastu_shastra_books_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/peter_thiel_zero_to_one_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/bbc_eastenders_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/lunewirewigobazupopom.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/79974909467.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/36702339457.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/pulmonary_hypertension_guidelines_esc.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_off0000608e.bin
572ce281061c28f4f713ee16c56284a2c8d38eea25933d08bf114591271db367
pdf-font-stream PDF embedded font (sfnt) at offset 0x608E 5240 bytes
font_01_sfnt_off0000727c.bin
7eb4d14154e667142d4afb48bd32a1fd2def1edc3646a7f74e6955ff919828c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 13912 bytes