Malicious PDF — malware analysis report

Static analysis result for SHA-256 e485712226339b81…

MALICIOUS

PDF

46.7 KB Created: 2020-09-04 21:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd5f24c714e03a09d1ec4d76a2a4ec8 SHA-1: 41b074131e101137af5afd7837e5ff3d84ed1784 SHA-256: e485712226339b813ffd57b2f4002bfa831e17b62a5b8d4af44316dfc7af5f63
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that is presented as a 'project feasibility study report template'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or SEO poisoning tactic. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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/pify?keyword=project+feasibility+study+report+template
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/bazat.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/berek_and_novak_s_gynecology_16th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0459/9100/2279/files/corporate_invitation_card_design_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/ipcc_guidelines_energy.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/vilesuvubufafevofafivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/53404684086.pdf
    • https://static.usrfiles.com/ugd/5cd33b_6d1bdd82dc7b43c2859829087e2ab660.pdf
    • https://static.usrfiles.com/ugd/32777b_c98937a35e61485aa78757004d02bf2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fb2f9cbee6942548e2d36f1f208073c.pdf
    • https://static.usrfiles.com/ugd/e8506d_7193ce96dd124d74b44637228cd267be.pdf
    • https://static.usrfiles.com/ugd/296484_aeeb953f28ea4f0ab734e29ce48a98f6.pdf
    • https://static.usrfiles.com/ugd/8de238_13093e735ac647c9b9b2315c2f8bc93a.pdf
    • https://static.usrfiles.com/ugd/7c3584_256754a20dfe4f5cb6ecf81f99fe001c.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_off0000772b.bin
1d5a4902f768cc8aeca83df0ae50f2bcc7effeb60b2788fd8bdc7bdadba0c742
pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 5620 bytes
font_01_sfnt_off00008a3c.bin
94dca3e052775c0c2b47752cdd1fd12eaf01a95fcde51d6149a65100abe58f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 10428 bytes