Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b17459210ff51ba…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 03:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa7e7a3b68ed575609743290c7c1acca SHA-1: 4d46ae95186449ee504f48dfae3bbd14bdb73135 SHA-256: 2b17459210ff51ba4e80a0f946bf4090c02182032d25977f93b1db7a5b30550d
152 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to an air conditioner manual, suggesting a lure. The presence of a link farm further indicates malicious intent, likely to distribute further malware or phishing content.

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/wix?keyword=manual+de+uso+aire+acondicionado+mirage
    • https://cdn.shopify.com/s/files/1/0429/3984/2719/files/numerical_methods_for_solving_nonlinear_equations.pdf
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/manual_prctico_de_biomagnetismo_holstico.pdf
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/80127585922.pdf
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/46298796281.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/joxafogusunijobexudideran.pdf
    • https://static.usrfiles.com/ugd/b8c837_4536432e33f543c28ac784e3644ea2a7.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_77e0be5e404c4c9c82152eb3904874fc.pdf
    • https://static.usrfiles.com/ugd/1decf9_b7b018243f474c5f922e453b3e8131be.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/how_to_use_github_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/94891836482.pdf
    • https://static.usrfiles.com/ugd/6116da_2fb5b7ac152241ccac46b97db892bf57.pdf
    • https://static.usrfiles.com/ugd/7e6083_d7e7d2d6360744f2b7ce260d722d72ac.pdf
    • https://static.usrfiles.com/ugd/f46427_d12a2ff518a941eea049227f81e8b769.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a080ea90e7643849987ba25e7c634b6.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_off0000636b.bin
9935718e926ea3b7f43d3d74780f2084c6b934fd187439f754e9605dec03c280
pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 5264 bytes
font_01_sfnt_off0000753a.bin
6827a4d0fdf7d0ce29f970786fe44f292b4475651128783003a50152ff822369
pdf-font-stream PDF embedded font (sfnt) at offset 0x753A 11628 bytes